Bulletin 140U Molded Case Circuit Breakers 11 Visit our website: www.ab.com/catalogs Multitap End Cap Optional Optional Optional 140U-J-MTL3A 140U-J-MTL6A 140U-J-ECM Aluminum Aluminum Molded Housing 1/4…20 screw 1/4…20 screw — 50 lb-in 50 lb-in — 5.6 N•m 5.6 N•m — Cu/Al Cu/Al — 60/75°C 60/75°C — (3) (6) — (A) 3/8…1/2 in. (B) 3/4…7/8 in. (C) 1-1/4…1-3/8 in. (A) 3/8…1/2 in. (B) 3/4…7/8 in. (C) 1-1/4…1-3/8 in. — (A) 9…13 mm (B) 19…22 mm (C) 32…35 mm (A) 9…13 mm (B) 19…22 mm (C) 32…35 mm — #14…#2 #14…#6 — 2.5…25 2.5…10 — Allen - 5/32 in. (4 mm) Allen - 3/32 in. Allen - 4 mm 70 lb-in 25 lb-in 275' Lb-in 7.9 N•m 2.8 N•m 31 N•m Optional Optional Optional 140U-K-MTL3A 140U-K-MTL6A 140U-K-ECM Aluminum Aluminum Molded Housing .375 x 25 screw .375 x 25 screw — 72 -96 lb-in 72 -96 lb-in — 8.6…10.8 N•m 8.6…10.8 N•m — Cu/Al Cu/Al — 60/75°C 60/75°C — (3) (6) — (A) 9/16.…3/4 in. (B) 1-3/16.…1-1/2 in. (C) 1-7/8…2-1/4 in. (A) 9/16.…3/4 in. (B) 1-3/16.…1-1/2 in. (C) 1-7/8…2-1/4 in. — (A) 14…19 mm (B) 30…38 mm (C) 48…57 mm (A) 14…19 mm (B) 30…38 mm (C) 48…57 mm — #12…2/0 #14…2/0 — 4…70 2.5…70 — Allen - 3/16 in. (X mm) Allen - 1/8 in. (3 mm) Allen - 8 mm 120 lb-in 25 lb-in 275 Lb-in 13.5 N•m 2.8 N•m 31 -m
13
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Bulletin 140U Molded Case Circuit Breakers...CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING 10,000 Circuit Breaker Time/Current Curves For application and coordination purposes only.
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Bulletin 140U
Molded Case Circuit Breakers
11Visit our website: www.ab.com/catalogs
Multitap End Cap
Optional Optional Optional
140U-J-MTL3A 140U-J-MTL6A 140U-J-ECM
Aluminum Aluminum MoldedHousing
1/4…20 screw 1/4…20 screw —
50 lb-in 50 lb-in —
5.6 N•m 5.6 N•m —
Cu/Al Cu/Al —
60/75°C 60/75°C —
(3) (6) —
(A) 3/8…1/2 in. (B) 3/4…7/8 in. (C) 1-1/4…1-3/8 in. (A) 3/8…1/2 in. (B) 3/4…7/8 in. (C) 1-1/4…1-3/8 in. —
(A) 9…13 mm (B) 19…22 mm (C) 32…35 mm (A) 9…13 mm (B) 19…22 mm (C) 32…35 mm —
#14…#2 #14…#6 —
2.5…25 2.5…10 —
Allen - 5/32 in. (4 mm) Allen - 3/32 in. Allen - 4 mm
70 lb-in 25 lb-in 275' Lb-in
7.9 N•m 2.8 N•m 31 N•m
Optional Optional Optional
140U-K-MTL3A 140U-K-MTL6A 140U-K-ECM
Aluminum Aluminum MoldedHousing
.375 x 25 screw .375 x 25 screw —
72 -96 lb-in 72 -96 lb-in —
8.6…10.8 N•m 8.6…10.8 N•m —
Cu/Al Cu/Al —
60/75°C 60/75°C —
(3) (6) —
(A) 9/16.…3/4 in. (B) 1-3/16.…1-1/2 in. (C) 1-7/8…2-1/4 in. (A) 9/16.…3/4 in. (B) 1-3/16.…1-1/2 in. (C) 1-7/8…2-1/4 in. —
(A) 14…19 mm (B) 30…38 mm (C) 48…57 mm (A) 14…19 mm (B) 30…38 mm (C) 48…57 mm —
#12…2/0 #14…2/0 —
4…70 2.5…70 —
Allen - 3/16 in. (X mm) Allen - 1/8 in. (3 mm) Allen - 8 mm
Material CU/Plate Std/Optional — Optional Optional —
Dim.
A 1/2”(12.7) Cat. No. — 140U-N-TLA4 140U-N-TLA3 —
B 3/8”(9.53) Material — Aluminum Copper —
C 1/8”(3.175) Terminal FastenerHardware — —
Fastener Slip on boxlug
TerminalFastenerTorque
Lb-in — 35…45 35…45 —
TorqueLb-in — N•m — 4…5 4…5 —
N•m — Cable Type — CU/Al Cu/Al —
A
B
C
Cable TemperatureRating — 60/75°C 60/75°C —
Cable Quantity — (4) (3) —
Wire StripLength
in. — 4-3/8 4-3/8 —
mm — 111.125 111.125 —
Wire RangeAWG — 4/0…500MCM 3/0…400 MCM —
mm2 — 11.7…240 85…185 —
Terminal Type — Allen Allen —
Wire TorqueLb-in — 375 375 —
N•m — 42.2 42.4 —
Bulletin 140U
Molded Case Circuit Breakers
16 Visit our website: www.ab.com/catalogs
2.0050,8[ ]
3.2281,8[ ]
Ø.143,6[ ]
.8421,4[ ]
1.2230,9[ ]
2.4261,5[ ]1.00
25,4[ ]
3.2181,5[ ]
.4912,5[ ]
.4912,4[ ]
1.0025,4[ ]
1.2230,9[ ]
.164[ ]
.8421,4[ ]
.164,1[ ]
.9724,6[ ]
15-20 AMP, CLAMP ANDBINDING SCREW TERMINALS
25-100 AMP, PRESSURE COLLAR TERMINALS
Dimensions
G Frame
Bulletin 140U
Molded Case Circuit Breakers
17Visit our website: www.ab.com/catalogs
1.0025,4[ ]
3.2281,7[ ]
3.0076,2[ ]
4.88123,8[ ]
3.2181,4[ ]
1.2231[ ]
2.4161,2[ ]
.8421,3[ ]
Ø.164,1[ ]
2.8371,8[ ]
.369,1[ ]
.4511,4[ ]
1.0025,4[ ]
1.0025,4[ ]
.369,1[ ]
.4511,4[ ]
140UG FRAME
140U G-FRAME
Bulletin 140U
Molded Case Circuit Breakers
26 Visit our website: www.ab.com/catalogs
Time-Current Curves
Bul.140U
Time-Current Curves for Bulletin 140U-G Thermal-Magnetic Molded Case Circuit Breakers
40752-600 (1)SC-6030-95Effective October 1997
Maximum
Interrupting Rating (See Tabulation Above)
Instantaneous Trip (See Tabulation Above)
Maximum Interrupting Time
Minimum
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
SDN O
CES
N I E
MIT
1,000
500
200
5,000
3,000
2,000
RUOH
1ET
UNI
M 1
SRUO
H 2
SDN OCES
NI EMIT
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
RUO H 1E TU
NIM 1
SRU OH 2
001080 6 0 90705
0 001
008
0 06
009
007
005
004
003
002
0 00,01
0008
0 006
0 009
0007
000 5
0004
0 003
0002
000,001
00 0, 08
00 0, 06
000,09
000,07
000,0 5
00 0, 04
000,03
000,02
00 0, 01
0008
0006
0009
0007
00 05
0004
0003
00 02
0001
008
00 6
009
007
005
004
003
002
00 1
080 6 090705 000 ,0 01
000 ,0 8
000,0 6
000 ,0 9
0 00 ,07
0 00,05
000,04
000,03
0 00,02
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING
10,000
300
Circuit Breaker Time/Current Curves
For application and coordination purposes only. Based on 40 °Cambient, cold start. Connected with four (4) feet of rated wire(60/75°C) per terminal. Tested in open air with current in all polesexcept for instantaneous trip, see below.
Maximum VoltsBreakerType
140U-G
Breaker Rating
Continuous Amperes
15-6070-100
Interrupting Rating (UL Listed)BreakerType
140U-G
Ac Volts60 Hz
480
Instantaneous Trip, AmperesSingle Pole
500-13001300-1800
Symmetrical RMS Amperes240 Volts
65,000
2 Poles in Series
400-1100700-1300
480 Volts
22,000
Bulletin 140U
Molded Case Circuit Breakers
32 Visit our website: www.ab.com/catalogs
Bul.140U
Time-Current Curves for Bulletin 140U-K3/K6 Thermal-Magnetic Molded Case Circuit Breakers
40752-630 (1)SC-4118-87BEffective October 1997
Maximum
Maximum Single PoleTrip Times at 25°C ➀
Adjustable Magnetic Trip
X5
±20% ±10%X01
(250-400A)
(125-225A)
(100A)
Circuit Breaker Time/Current Curves
For application and coordination purposes only.Based on 40 °C ambient, cold start. Connected with four (4) feet ofrated wire (60°C up to 125 A. 75° C above 125 A) per terminal.Tested in open air with current in all poles. Instantaneous calibrationbased on single-pole tests.
Maximum Voltage600V., AC (60 Hz)250 V., DC
Breaker RatingRated Amperes (In)
Interrupting Rating (UL/CSA)
Single pole data at 25°C based on NEMA Procedures(AB 4-1991) for verifying performance of molded case circuitbreakers.
➀
RMS Sym AmperesBreakerType
Instantaneous Trip Amperes
65,000100,000
100, 125, 150,175, 200, 225,250, 300, 350,400
500 to 1000% of trip unit rating(See Figure Below)(Dc values are approximately 40% higher)
Amperes
TypicalTrip UnitNameplate
Individual PoleAdjustments
ThermalMagneticTrip Unit
C Push to Trip
MagneticMultiples Of In
10
7.5
10 5
7.5
10 5
Amps(In)
Cat.No.40°C
7.5
5
Minimum
@ 240 V., AC @ 480 V., AC @ 600 V., AC @ 250 V., DC
35,00065,000
25,00035,000
10,00022,000
140U-K3140U-K6
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
SDNO
CES
NI E
MIT
1,000
500
300
200
5,000
3,000
2,000
RUOH
1ET
UN I
M 1
SRU O
H 2
SDN OC ES
NI EM IT
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
R UOH 1ETU
NIM 1
SRUOH 2
0010806 090705
0001
00 8
00 6
009
0 07
005
0 04
00 3
00 2
0 00,01
000 8
0006
0 009
0007
00 05
000 4
00 03
0002
000 ,0 01
00 0,08
000,06
000 ,09
000,07
00 0,05
000,04
000 ,03
0 00,02
000 ,01
0 008
0 006
0009
0007
0 005
0004
0003
0002
000 1
00 8
006
009
007
0 05
00 4
0 03
00 2
001
0806 09070 5 000,0 01
000,08
000 ,06
000,09
000,07
000,05
000, 04
000 ,03
000, 02
Maximum Interrupting Time
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
10,000
Interrupting RatingDetermines Endof Curve
Time-Current Curves, Cont.
Bulletin 140U
Molded Case Circuit Breakers
33Visit our website: www.ab.com/catalogs
Bul.140U
Time-Current Curves for Bulletin 140U-K0 Thermal-Magnetic Molded Case Circuit Breakers
40752-631 (1)SC-4119-87BEffective October 1997
Maximum
Maximum Single PoleTrip Times at 25°C ➀
Adjustable Magnetic Trip
±20% ±10%X01
(250-400A)
(125-225A)
(100A)
X5
Circuit Breaker Time/Current CurvesFor application and coordination purposes only.Based on 40 °C ambient, cold start. Connected with four (4) feet ofrated wire (60°C up to 125 A. 75° C above 125 amps) per terminal.Tested in open air with current in all poles. Instantaneous calibrationbased on single-pole tests.
Maximum Voltage600V., AC (60 Hz)250 V., DC
Breaker RatingRated Amperes (In)
Interrupting Rating (UL/CSA)
Single pole test data at 25°C based on NEMA Procedures(AB 4-1991) for verifying performance of molded case circuitbreakers.
➀
RMS Sym AmperesBreakerType
Instantaneous Trip Amperes
200,000
100, 125, 150,175, 200, 225,250, 300, 350,400
500 to 1000% of trip unit rating(See Figure Below)(DC values are approximately 40% higher)
Amperes
TypicalTrip UnitNameplate
Individual PoleAdjustments
ThermalMagneticTrip Unit
C Push to Trip
MagneticMultiples Of In
10
7.5
10 5
7.5
10 5
Amps(In)
Cat.No.40°C
7.5
5
Minimum
@ 240 V., AC @ 480 V., AC @ 600 V., AC @ 250 V., DC
100,000 50,000 22,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
SDN O
CES
NI E
MIT
1,000
500
300
200
5,000
3,000
2,000
RUO H
1ET
UNI
M 1
S RUO
H 2
SDN OC ES
N I EMIT
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
RUO H 1ETU
NIM 1
SRUOH 2
0010806 090705
0001
008
006
009
007
005
00 4
003
002
000,01
0008
0006
0009
000 7
0 005
000 4
0003
0002
0 00,00 1
000,0 8
000,0 6
000,09
000,07
000,05
000,04
000,03
000,02
00 0,01
000 8
000 6
0009
0007
0005
0004
0003
0002
000 1
008
006
009
00 7
00 5
004
003
002
00 1
0806 0 9070 5 000 ,0 01
0 00,08
000,06
000,09
000, 07
00 0,05
000, 04
000,03
000,02
Maximum Interrupting Time
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
CURRENT IN PERCENT OF BREAKER TRIP UNIT RATING (In)
10,000
Interrupting RatingDetermines Endof Curve
600 V., Ac
480 V., Ac
240 V., Ac
140U-K0
Time-Current Curves, Cont.
Bulletin 140U
Molded Case Circuit Breakers
35Visit our website: www.ab.com/catalogs
Bul.140U/UE
Time-Current Curves for Bulletin 140U-K Electronic LSI, LSIG Trip Units and Bulletin 140U-K3, -K6 Molded Case Circuit Breakers
40752-633 (1)SC-5639-93Effective October 1997
X6
X8
X4
X 7
X3
X2
Standard FixedRating Plug
200 ms
100 ms
I
300 ms
X5
SDN OC ES
NI EMI T
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
RUOH 1ETU
NIM 1
SRUOH 2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.5
.5 201054321.8.6
1.8.6CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.7 .9 6 7 8 9
20105432 6 7 8 9
Short DelayPick UpSettings(Tolerance±10%)
Long Delay➀Minimum TotalClearing Time
Long Delay➀Maximum TotalClearing Time
.7 .9
Fixed InstantaneousOverride ➁
InterruptingRatingDeterminesEnd ofCurve ➂
000,01
.1
.01
0001
0005
0 004
0003
0002
000,02
.001
S DN OC ES
CURRENT IN AMPS
000,03
000 ,04
000 ,05
0 00, 00 1
1
.02
.03
.04
.05
.2
.3
.4
.5
TEST
Short Delay
Engaged
Remove
Cat.
In
Rating Plug
Push to TripPickup • xIr Time • ms
Trip Unit40oC
5
73
2 8
4 6300
100
INST
200
Curve accuracy applies from –20°C to +55°C ambient. For possible continuous amperederating for ambient above 40°C, consult Rockwell Automation.
For high fault current levels a fixed instantaneous override is provided at 4000A.(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.See above tabulation.
For ground fault time/current curve see 40752-636.
➀
➁
➂
➃
NotesElectronic trip units are suitable for functional field testing with test kit.For field testing using primary injection methods, follow NEMA publication AB-4-1991.
There is a memory effect that can act to shorten the long delay. The memory effectcomes into play if a current above the long delay pick up value exists for a time and thenis cleared by the tripping of a down stream device or the circuit breaker itself. Asubsequent overload will cause the circuit breaker to trip in shorter time than normal.The amount of time delay reduction is inverse to the amount of time that has elapsedsince the previous overload. Approximately five minutes is required between overloadsto completely reset the memory.
Adjustable Short Delay Time Typical Trip Unit Nameplate
AmpereRating (In)
Type Short DelayPickup RangeAmperes
CatalogNumber
140U-K3140U-K6
Time-Current Curves, Cont.
Bulletin 140U
Molded Case Circuit Breakers
37Visit our website: www.ab.com/catalogs
Bul.140U
Time-Current Curves for Bulletin 140U-K Electronic LSI, LSIG Trip Units and 140U-K0 Molded Case Circuit Breakers
40752-635 (1)SC-5645-93Effective October 1997
X6
X8
X4
X 7
X3
X2
Standard FixedRating Plug
200 ms
100 ms
I
300 ms
X5
.02
.03
.04
.05Fixed InstantaneousOverride ➁
InterruptingRatingDeterminesEnd ofCurve ➂
000,01
.1
.01
0005
0004
0003
000 2
0 00, 02
.001
S DNOC ES
CURRENT IN AMPS
0 00, 03
0 00, 04
00 0,0 5
00 0,0 01
1
000,002
600 VAC
480 VAC
240 VAC
MaximumInterruptingTime
TEST
Short Delay
Engaged
Remove
Cat.
In
Rating Plug
Push to TripPickup • xIr Time • ms
Trip Unit40oC
5
73
2 8
4 6300
100
INST
200
Curve accuracy applies from –20°C to +55°C ambient. For possible continuousampere derating for ambient above 40°C, consult Rockwell Automation.
For high fault current levels a fixed instantaneous override is provided at 4000A.(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.See above tabulation.
For ground fault time/current curve see 40752-636.
➀
➁
➂
➃
Noteselectronic trip units are suitable for functional field testing with test kit.For field testing using primary injection methods, follow NEMA publication AB-4-1991.
There is a memory effect that can act to shorten the long delay. The memory effectcomes into play if a current above the long delay pick up value exists for a time and thenis cleared by the tripping of a down stream device or the circuit breaker itself. Asubsequent overload will cause the circuit breaker to trip in shorter time than normal.The amount of time delay reduction is inverse to the amount of time that has elapsedsince the previous overload. Approximately five minutes is required between overloadsto completely reset the memory.
SDN OC ES
NI EMI T
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
RUOH 1ETU
NIM 1
SRUOH 2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.5
.5 2010
1.8.6CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
Fixed Short Delay Time Typical Trip Unit Nameplate
AmpereRating (I n)
Type Short DelayPickup RangeAmperes
Rating PlugCatalogNumber
240V (Ue) 380/415V (U e) 690V (U e)Icu Ics Icu Ics Icu Ics
Utilization Category AUimp = 8kV
65100
65100
5070
5050
2025
1013
Engaged
Remove
Cat.
In
Rating Plug
Push to Trip
Short DelayPickup x In
5
73
2 8
4 6Trip Unit40oC Ambient
Test
Curve accuracy applies from –20 °C to +55°C ambient. For possible continuous amperederating for ambient above 40 °C, consult Rockwell Automation.
For high fault current levels a fixed instantaneous override is provided at 5500A.(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.See above tabulation.
For ground fault time/current curves see 40752-678.
➁
➂
➃
NotesElectronic trip units are suitable for functional field testing with test kit.For field testing using primary injection methods, follow NEMA AB4-1991 publications.
Calibration response in short delay pick-up range is same for 1, 2 or 3 poles in series.
There is a memory effect that can act to shorten the long delay. The memory effect comesinto play if a current above the long delay pick-up value exists for a time and then is clearedby the tripping of a downstream device or the circuit breaker itself. A subsequent overloadwill cause the circuit breaker to trip in shorter time than normal. The amount of time delayreduction is inverse to the amount of time that has elapsed since the previous overload.Approximately five minutes is required between overloads to completely reset the memory.
BreakerType
InterruptingRatingDeterminesEnd ofCurve ➂
140U-M5140U-M6
140U-M5140U-M6
➀
Time-Current Curves, Cont.
Bulletin 140U
Molded Case Circuit Breakers
45Visit our website: www.ab.com/catalogs
Bul.140U
Time-Current Curves for Bulletin 140U-M Electronic LSI, LSIG Trip Units and 140U-M5, -M6 Molded Case Circuit Breakers
40752-677 (1)SC-6913-98Effective February 1999
X6
X8
X4
X7
X3
X2
Standard FixedRating Plug
200 ms
100 ms
I
300 ms
X5
SD NOCES N I EM IT
10,000
100
50
30
20
10
5
3
2
1
.5
.3
.2
.1
.05
.03
.02
.01
.005
.003
.002
.001
1,000
500
300
200
5,000
3,000
2,000
RU
OH 1
ET
UNI
M 1S
RU
OH 2
CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
.5
.5 201054321.8.6
1.8.6CURRENT IN MULTIPLES OF RATING PLUG AMPERES (In)
Adjustable Short Delay Time Typical Trip Unit Nameplate
AmpereRating (In)
Type Short DelayPickup RangeAmperes
Rating PlugCatalogNumber
140U-M5140U-M6
65100
Utilization Category AU imp = 8kV
140U-M5140U-M6
BreakerType
240V (Ue)
Icu Ics65
100
240V 480V 600V
5070
380/415V (U e )
Icu Ics5050
2025
690V (U e)
Icu Ics1013
65100
5065
2535
UL/CSA
RMS Sym. kA, 50/60 Hz
IEC 947-2
RMS Sym. kA, 50/60 Hz
Engaged
Remove
Cat.
In
Rating Plug
Push to Trip
Trip Unit40oC Ambient
Test
5
73
2 8
4 6
Short DelayPickup x In
300
100I
200
TimeMIsec
Curve accuracy applies from –20 °C to +55 °C ambient. For possible continuous amperederating for ambient above 40 °C, consult Rockwell Automation.
For high fault current levels a fixed instantaneous override is provided at 5500A.(Tolerance ±15%).
The end of the curve is determined by the interrupting rating of the circuit breaker.See above tabulation.
For ground fault time/current curves see 40752-678.
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NotesElectronic trip units are suitable for functional field testing with test kit.For field testing using primary injection methods, follow NEMA AB4-1991 publications.
Calibration response in short delay pickup range is same for 1, 2 or 3 poles in series.
There is a memory effect that can act to shorten the long delay. The memory effect comesinto play if a current above the long delay pickup value exists for a time and then is clearedby the tripping of a downstream device or the circuit breaker itself. A subsequent overloadwill cause the circuit breaker to trip in shorter time than normal. The amount of time delayreduction is inverse to the amount of time that has elapsed since the previous overload.Approximately five minutes is required between overloads to completely reset the memory.