Overview
The HYM1 Series Molded-Case Circuit Breaker (hereinafter referred to as “circuit breaker”) is a new type of circuit breaker designed and developed by our company with comprehensive international advanced technology. The circuit breaker has the rated isolation voltage of 800 V (500 V for HYM1-63), which is suitable for the distribution network with AC 50 Hz, rated working voltage of 690 V (400 V for HYM1-63) and below, and rated working current up to 1,250 A. It is used to distribute electric energy and as overload, short-circuit and undervoltage protection of lines and power supply equipment, as well as infrequent switching of lines and infrequent starting and overload, short-circuit and undervoltage protection of motors (use category: AC-3).
Such circuit breakers can be divided into L-type (standard type), M-type (relatively high breaking type) and H-type (high breaking type) according to their rated ultimate short circuit breaking capacity (Icu). The product is characterized by small size, high breaking capacity, short flashover and anti-vibration.
This product complies with the requirements of GB14048.2.
Normal working conditions
1. Altitude ≤ 2,000 m.
2. The upper limit of ambient air temperature shall not exceed +40°C, the lower limit shall not be lower than - 5°C, and the average value within 24 hours shall not exceed +35°C.
3. Atmospheric conditions: The relative air humidity shall not exceed 50% when the ambient air temperature is +40°C. A higher relative humidity is allowed at a lower temperature. The average maximum relative humidity of the wettest month can be up to 90%, and the average temperature of that month is 25°C. The condensation that occurs on the product surface due to temperature changes shall also be considered.
4. Contamination grade: Grade 3.
5. The installation category is III, and the circuit breaker with 1,250 A Inm is IV.
Model description
1、Model description
Note:
(1) The neutral pole (N) of the 4-pole product can be divided into four types:
Type A: The N pole is not equipped with an overcurrent tripping element and is normally on, and is not closed/opened with the other three poles.
Type B: The N pole is not equipped with an overcurrent tripping element, and is closed/opened with the other three poles (the N pole is closed first and then opened).
Type C: The N pole is equipped with an overcurrent tripping element, and is closed/opened with the other three poles (the N pole is closed first and then opened).
Type D: The N pole is equipped with an overcurrent tripping element and is normally on, and is not closed/opened with the other three poles.
(2) The circuit breaker for distribution has no code, and the circuit breaker for motor protection is denoted by 2.
(3) The handle direct operation has no code, the electric operation is denoted by D, and the handle rotation operating mechanism is denoted by Z.
2. Classification
2.1According to the rated current of overcurrent release (A): HYM1-63: (6), 10, 16, 20, 25, 32, 40, 50, 63 A; HYM1-125: 16, 20, 25, 32, 40, 50, 63, 80, 100, 125 A; HYM1-250: 100, 125, 140, 160, 180, 200, 225, 250 A; HYM1-400: 225, 250, 315, 350, 400 A; HYM1-630: 400, 500, 630 A; HYM1-800: 630, 700, 800A; HYM1-1250: 800, 1,000, 1250 A.
Note: a. 6A specifications are only for the electromagnetic (instantaneous) type; b. The current with () is not recommended.
2.2The wiring mode can be divided into three types: wring in front of the plate, wring behind the plate, and plug-in connection.
2.3According to the type of overcurrent release, it can be divided into thermal-electromagnetic (compound) type and electromagnetic (instantaneous) type.
2.4According to the auxiliary devices, it can be divided into the types with or without auxiliary devices: Auxiliary devices are divided into internal devices and external devices. Internal devices include shunt trip, undervoltage release, auxiliary contact and alarm contact, and external devices include handle rotating operation mechanism and electric operating mechanism.
Technical parameters
