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Scope Of Application

TXCM1E lv Current adjustable circuit breaker  (hereinafter referred to as circuit breaker), the circuit breaker has small size, high breaking capacity, short arc, anti vibration. Its rated insulation voltage is 800V, suitable for the distribution network of AC 50Hz, rated voltage AC400V, rated current up to 1250A and below, used to distribute electrical energy and protect the circuit and power equipment from overload, short-circuit, undervoltage and other faults. It can also be used for the infrequent conversion of the line and the infrequent starting of the motor. The circuit breaker can be vertically installed, or horizontally installed. The lv circuit breaker has isolation function.

Main Features

TXCM1E adjustable electronic moulded case circuit breaker has three protection function, the circuit breaker with utilization category B connected with other short-circuit protection device in the same circuit has completely optional under short circuit circumstance; With five tripping features, the user can set the equipment through the shunt release according to the load current, electronic shunt release is powered by circuit breaker itself; current signal and control power is from the circle circuit transformer installed in the circuit breaker; With fire protection shunt release for alarming but not trip, when the load current is overloaded, the circuit breaker does not trip, and output the passive contact, driving the corresponding alarm device; The dimensions and specifications are the same as those of TXCM1 MCCB, the installation can be changed.

Normal Service Conditions and Installation Conditions

1. The elevation of the installation site is not more than 2000m.
2. The ambient temperature is not more than +40℃, and the average temperature within 24h is not more than +35℃, the lower limit of the ambient temperature is -5℃.
3. When the max temperature is +40℃, the relative humidity of air is not more than 50%, can allow a higher relative humidity at a lower temperature, such as 90% at 20℃, special measures should be taken for the condensation produced occasionally on the product due to temperature changes.
4. The pollution degree is 3.
5. The circuit breaker installation of main circuit category is class III, the installation category of auxiliary circuit and control circuit not connect to the main circuit is II.
6. Use category is A or B.

Model and Meaning


Note: 1) No code for circuit breaker for distribution, 2 for circuit breaker for protecting motor.
2) No code for handle direct operation, P for electric operation, Z for the rotating handle.
2. Classification
A. According to the rated limit short-circuit breaking capacity, divided into standard (S), high breaking (H);
B. According to the mode of connection, divided into three types: front connection, rear connection and plug-in;
C. According to the pole, divided into three-poles and four-poles. The N-phase of the 4-pole products is not equipped with the overcurrent release, and the N-phase is on-off with the other phase;
D. According to the accessory device, divided into with accessory device and without accessory device: accessory device is divided into internal and external devices: the internal device has shunt release, under voltage release, auxiliary contact, alarm contact, the external device has rotating handle operating mechanism, electric operation mechanism etc..


Accessory Name Accessory Code Tripping Mode
- 300 Electric Tripping Unit
Alarm Contact 308
Shunt Release 310
Auxiliary Contact 320
Undervoltage Release 330
Shunt Release + Auxiliary Contact 340
Shunt Release + Undervoltage Release 350
Two Groups of Auxiliary Contacts 360
Auxiliary Contact + Undervoltage Release 370
Alarm Contact + Shunt Release 318
Alarm Contact + Auxiliary Contact 328
Undervoltage Release + Alarm Contact 338
Auxiliary Contact + Alarm Contact + Shunt Release 348
Two Groups of Auxiliary Contacts + Alarm Contact 368
Undervoltage Release + Auxiliary Contact + Alarm Contact 378

Note: 1. TXCM1E-100, 225 only have accessories of 308, 310, 320, 330, 328;
2. TXCM1E-400 only have 3-pole accessories of 308, 310, 320, 330, 328;
3. TXCM1E-400 only have no 4-pole accessories of 350, 318, 338, 348, 378.

Note: in the setting, the dial switch must be set in place!
Note:
1. Adjust overload long delay action current Ir1, according to the different circuit breaker rated current, 4-10 files can be adjusted;
2. Adjust long delay action time t1, 4 files can be adjusted;
3. Adjust short-circuit short-delay action current Ir2, 9 files can be adjusted;
4. Adjust short delay action time t2, 4 files can be adjusted;
5. Adjust short-circuit instantaneous action current Ir3 action, 9 files can be adjusted;
6. Adjust pre-alarm action current Ir0, 7 files can be adjusted.

Main Technology Parameters

The setting range of intelligent controller is shown in the table

Setting Project Setting Range
Setting value of overload long delay Current setting value lr1 (30~100)A,(100~250)A,(200~400)A,(400~630)A,(630~800)A,(800~1250)A
Time setting value t1 (12、60、80、100)s
Setting value of short circuit and short delay Current setting value lr2 (2~12)In
Time setting value t2 (0.06, 0.1, 0.2, 0.3)s
Setting value of instantaneous short circuit Current setting value lr3 (4~14)In

The main technical data of circuit breaker are shown in table

Model TXCM1E-100 TXCM1E-250 TXCM1E-400 TXCM1E-630 TXCM1E-800 TXCM1E-1250
Frame Current Inm(A) 100 250 400 630 800 1250
Breaking Capacity L M L M L M M H M H H
Rated Current In(A) 63,80,100 225,250 300,400 500,630 700,800 1000,1250
Pole 3,4 3,4 3,4 3,4 3,4 3,4 3,4 3,4 3,4 3,4 3,4
Rated Operational Voltage Ue(V) AC400
Rated Insulation Voltage Ui(V) 800
Rated Impulse Withstand Voltage Uimp(V) 8000
Rated limit short circuit breaking capacity Icu(kA) 50 85 50 85 65 100 65 100 65 100 80
Rated running short circuit breaking capability Ics(kA) 35 50 35 50 42 65 42 62 42 62 50
Rated short-time withstand current Icw/0.5s(kA) - - 5 8 10 15/1S
Usage Category A A B B B B
Flashover Distance (mm) ≤50 ≤50 ≤100 ≤100 ≤100
Operating Performance Power-on (Times) 1500 1000 1000 500 500 500
Power-off (Times) 8500 7000 4000 3000 3000 3000

Characteristics of release

a. Characteristics of Electric Trip Unit
With overload long-delay inverse time, short-circuit short-delay inverse time, short-circuit short delay time limit, short-circuit instantaneous action and other protection features, the protection characteristics can be set up by the users.
b. Overload long delay inverse time protection action characteristics in Table 4.
c. Short-circuit short-delay protection action characteristics in Table 5.
d. Short-circuit instantaneous protection action characteristics in Table 6.

Controller Types Basic type Intelligent communication type, programming communication type, liquid crystal type
Current Action Time
1.05lr1 No action within 2 hours
1.3lr1 ≤1h action
2lr1 Inm=100A, 250A Setting time t1(s) t1=(12, 60, 80, 100)s 12s-100s(most progress 1s)
Inm=400A, 630A, 800A Setting time t1(s) t1=(12, 60, 80, 100)s 12s-100s(most progress 1s)
Thermal Memory 30min, can be cleared after power off (this function is optional function in intelligent communication type and programming communication type)
1. Action time I²t1 = (2Ir1) ²t1 (1.2Ir1≤I 2. Action time tolerance is ± 20%;
3. Returnable time is not less than 70% action time.

Short delay overcurrent protection characteristics
Current Action Time
Ir2≤I<1.5Ir2 Inverse Time I²t2=(1.5Ir2)²t2
1.5Ir2≤I<Ir3 Definite time Setting time t2(s) 0.06 0.1 0.2 0.3
Tolerance (s) ±0.02 ±0.03 ±0.04 ±0.06
Returnable time (s)


0.21
Note: Inverse time action time tolerance is ± 20%.

Short-circuit instantaneous protection action characteristics
Rated Current 100, 225(250) 400, 630 800
Setting Current Ir3=4, 6, 7, 8, 10,
11, 12, 13, 14
Ir3=4, 6, 7, 8, 10,
11, 12, 13, 14
Ir3=4, 5, 6, 7, 8,
9, 10, 11, 12
Operation Characteristics I≤0.85Ir3 non-operation
I≥1.15Ir3 operatino

Technical data of accessory device

a. Rated values of auxiliary contacts and alarm contacts are shown in table

Type Frame Rated Current
Inm(A)
Conventional Thermal Current
Ith(A)
Rated Operational Current Ie(A)
AC400V
DC220V
Auxiliary Contact Inm≤400 3 0.3 0.15
Inm≥400 3 0.4 0.15
Alarm Contact 100≤Inm≤800 3 0.3 0.15

b. The rated control power supply voltage (Us) and rated operating voltage (Ue) of the control circuit release and electric mechanism are shown in Table 8
Type Rated Voltage (V)
AC50Hz DC
Release Shunt Release Us 220/380 110、220
Undervoltage Release Ue 220/380 -
Electric Mechanism Us 220/380 110、220
c. When the applied voltage of the shunt release is between 70%~100% of the rated power voltage, the circuit breaker should be reliably broken.
d. When the power voltage drops to 70% ~ 35% of the rated voltage of the undervoltage release, the undervoltage release can reliably break the circuit breaker; When the power voltage is lower than 35% rated voltage of the undervoltage release, the undervoltage release can prevent the circuit breaker from closing; When the power voltage is higher than 85% rated voltage of the undervoltage release, the undervoltage release can ensure the reliable closing of the circuit breaker.
e. Electric operating mechanism at the rated frequency, between 85% ~ 110% power voltage, the circuit breaker can be reliably closed.

Outline and Installation Dimensions

1. The dimensions are shown in figure 3~figure 6 and the table

(1) Dimensions of front connection see Figure 3 (X-X, Y-Y is the center of 3P circuit breaker)

Model TXCM1E-100 TXCM1E-250 TXCM1E-400 TXCM1E-630 TXCM1E-800
Front Connection W 92 107 150
210
W1 60 70 96
140
L 150 165 257
280
L1 100 132 220
240
L2 132 144 244
243
H 93 90 107
116
H1 112 110 147
155
H2 29 24 38
46
H3 12 5 9.5
15
H4 4 4 6.5
5
E 55 65 92
83
F 25 25 68
68
G 18 22 30
44
W2 122 142 198
280
W3 90 105 144
210
M1 M8 M8 M10 M10 M12

(2) Dimensions of rear connection see Figure 4 and 5
(3) Dimensions of plug-in type front connection see Figure 6
(4) Dimensions of plug-in type rear connection see Figure 7
Model TXCM1E-100 TXCM1E-250 TXCM1E-400 TXCM1E-630 TXCM1E-800
Rear Connection L4 164 173 267
295
H5 53 55 68
84
H6 93 100 128
-
H7 35 35 37
37
M1 M8 M8 M10 M10 M12
d - 8.5 10.5
13
t - - 8.5
16
Plug-in Connection L6 168 183 279
296
H8 50 50 60
61
H9 64 72 84
97
H10 76 87 107
148
H11 18 18 21
16
M1 M8 M8 M10 M10 M12
M2 M6 M6 M6 M8 M8
L7 220 252 357
-
L8 250 276 387
-

2. Dimensions for mounting plate opening

(1) Dimensions of front connection see Figure 8 (X-X, Y-Y is the center of 3P circuit breaker)

Model TXCM1E-100 TXCM1E-250 TXCM1E-400 TXCM1E-630 TXCM1E-800
Pole 3 4 3 4 3 4 3 4 3
Dimensions for mounting plate opening (mm) A 30 35 44 70 70
B 129 126 194 243 303
d 4.5 4.5 7 7 7
(2) Dimensions of rear connection see Figure 9 (X-X, Y-Y is the center of 3P circuit breaker)
Model TXCM1E-100 TXCM1E-250 TXCM1E-400 TXCM1E-630 TXCM1E-800
Pole 3 4 3 4 3 4 3 4 3 4
Dimensions for mounting plate opening (mm) A 60 - 70 - 96 -

140 -
A1 - 90 - 105 - 144

- 210
B 72 - 87 - 124 -

178 -
B1 - 102 - 122 - 172

- 248
C 90 93 164
158
D 132 144 224
243
Φ1 22 24 32
48
Φ2 5.5 5.5 6.5
7

Model TXCM1E-100 TXCM1E-250 TXCM1E-400
Pole 3 3 3
Dimensions for mounting plate opening (mm) A 92 107 150
B 60 70 60
C 56 54 129
D 38 63.2 62
E 92 94 109
d 6.5 6.5 8.5

(4) Dimensions of plug-in type rear connection see Figure 10 (X-X, Y-Y is the center of 3P circuit breaker)

Model TXCM1E-100 TXCM1E-250 TXCM1E-400 TXCM1E-630 TXCM1E-800
Pole 3 4 3 4 3 4 3 4 3 4
Dimensions for mounting plate opening (mm) A 94 - 110 - 152 -

215 -
A1 - 125 - 145 - 200

- 283
B 60 - 70 - 60 -

140 -
B1 - 90 - 105 - 108

- 210
C 56 54 129
143
D 48 58 65
65
E 90 88 166
183
d 6.5 6.5 8.5
10

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