WESTINGHOUSE HC series molded case circuit breaker

WESTINGHOUSE HC series molded case circuit breaker

Product Overview and Core Parameters

Category specific specifications

Product Name: HC Series Molded Case Circuit Breaker (MCCB)

Implement standard IEC/EN 60947-2

Rated current range 16A-1250A (graded by frame number)

Polar configuration 1P, 2P, 3P, 4P

Rated insulation voltage (Ui) G/F/J frame: 800V; K/L/N frame: 1000V

Rated operating voltage (Ue) AC 415V (maximum 690V), DC 250V

Short circuit breaking capacity (Icu) 6kA (690V) -120kA (415V)

Rated short-time withstand current (Icw) 1.2kA (G125) -20kA (N1250)

Release method: thermal magnetic type (F: fixed heat+fixed magnetic; T: Adjustable heat+fixed magnet; TM: adjustable heat+adjustable magnetic), electronic (LSI: long delay+short delay+instantaneous; LSIG: including ground fault protection)

Environmental temperature levels of 40 ℃ and 55 ℃ (different series are suitable for different temperatures)

Mechanical lifespan: 7000 to 14000 cycles

Electrical lifespan of 2000 cycles (In, 415V AC)

Core product series (divided by framework number)

（1） Core parameter table of each framework

Frame number, rated current range, core series, short-circuit breaking capacity (Icu), tripping method, temperature adaptation

G frame 16A-125A GI, GS, GIY (non automatic) 25kA, 36kA F, T, TM 40 ℃, 55 ℃

F frame 16A-160A FS, FH, FN, FNY (non automatic) 36kA, 50kA, 75kA F, T, TM 40 ℃, 55 ℃

J framework 100A-250A JS, JH, JN, JNY (non automatic) 36kA, 50kA, 75kA F, TM 40 ℃, 55 ℃

K frame 250A-630A KS, KH, KN, KNY (non automatic) 36kA, 50kA, 100kA F, TM 40 ℃, 55 ℃

L-frame 500A-800A LH, LHY (non automatic) 70kA TM, LSIG 40 ℃, 55 ℃

N-frame 1000A-1250A NH, NHY (non automatic) 70kA LSIG 40 ℃, 55 ℃

（2） Typical Series Details

G Framework (16-125A): Suitable for small current circuit protection, cable cross-section 3-95mm ², size (H × W × D) 130 × 25 × 76.8mm (1P), weight 0.3kg-0.9kg, supports DIN rail installation, connects miniature circuit breakers with industrial grade plastic case circuit breakers.

K frame (250-630A): Short circuit breaking capacity up to 100kA, cable cross-section 95-500mm ², size 257 × 140 × 108mm (3P), weight 4.1kg-5.8kg, supports busbar connection, suitable for industrial heavy-duty circuit protection.

N-frame (1000-1250A): Electronic Release (LSIG), size 406 × 210 × 140mm (3P), weight 21.3kg-28.3kg, pull-out installation, used for incoming line protection of large distribution systems.

Installation and connection method

（1） Installation type

Fixed: All frames are supported and directly fixed to the distribution board, making installation convenient.

Plug in: F/J/K/L/N frame adaptation, front side disassembly is achieved through plug-in adapters for easy maintenance.

Pull out type: J/K/L/N frame adaptation, including movable mechanism and fixed cassette, supporting circuit breaker pull out maintenance without affecting the main circuit.

（2） Connection specifications

Frame number connection method, cable cross-section

G-frame cable connection 3-95mm ²

F-frame cable connection 2.5-150mm ²

J-frame cable/busbar connection 50-185mm ²

K frame cable/busbar connection 120-500mm ²

L/N frame busbar connection 95-500mm ²

Core accessory system

Accessory Type Function Description Adaptation Framework

Auxiliary switch 1NO+1NC conversion contact, used for signal feedback of the entire frame

Shunt Trip remote control circuit breaker opening, supporting AC/DC voltage full frame

Undervoltage Release automatically opens when the voltage is insufficient, protecting the entire equipment frame

Padlockable Handle locks the ON/OFF position to prevent accidental operation of the entire frame

Pull out cassette specifically designed for pull-out installation, including secondary terminal block J/K/L/N frame

Electric opening and closing of motor operating mechanism, supporting local/remote operation of the entire framework

Plug in adapter for plug-in installation, simplifying disassembly of F/J/K/L/N frames

Rotate the handle mechanism to change the direction of operation and adapt to the installation of the entire cabinet door frame

Key performance characteristics

release characteristics

Overload tripping: The thermal magnetic type generates heat through bimetallic plates, while the electronic type detects current through electronic components; Adjustable thermal release range 0.7-1.0In.

Short circuit release: Magnetic release fixed 5In or adjustable 5-10In, instantaneous breaking time ≤ 0.1s.

Ground fault protection: The electronic LSIG release supports ground fault detection and tripping.

environmental adaptability

Temperature adaptation: The 40 ℃ series operates at full load at an ambient temperature of 40 ℃, while the 55 ℃ series is suitable for high temperature scenarios.

Mechanical/electrical lifespan: Mechanical lifespan is 7000-14000 cycles, electrical lifespan is 2000 cycles (In, 415V AC).

safety protection

Insulation protection: The creepage distance and electrical clearance comply with IEC standards, and the terminal protection cover reaches IP30 level.

Reliability of breaking: After short circuit breaking, it can be repeatedly closed, Ics=70%-100% Icu， Ensure that it can still be used normally after disconnection.