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.

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.

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

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

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

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

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.

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)

(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

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)

(2) Dimensions of rear connection see Figure 9 (X-X, Y-Y is the center of 3P circuit breaker)