GENERAL

HGM-125 series moulded case circuit breaker (hereafter simply referred to as breakers), the rated insulation voltage of the breakers is 1000V. In the circuit of AC50Hz/60Hz, rated working voltage 690V or below ,rated current from 5A to 125A, the breakers take the role of infrequent turn-on or turn-off .The breakers have overload and short-circuit protection devices ,so as to protect the circuit and the power equipment against damage.

The breakers could be installed vertically or horizontally.

The breakers have isolating function and its corresponding symbol is shown as .

The breakers comply with the demands of the following standards:

IEC60947-1 and GB14048.1  Low-voltage switchgear and controlgear——Part1：General rules.

IEC60947-2 and GB/T14048.2  Low-voltage switchgear and controlgear——Part 2：Circuit-breaker.

NORMAL SERVICE AND MOUNTING CONDTIONS

The ambient air temperature does not exceed ＋40℃ and its average over a period of 24h does not exceed ＋35℃,the lower limit of the ambient air temperature is －5℃.

The altitude of the site of installation does not exceed 2000m.

The relative humidity of the air does not exceed 50% at a maximum temperature of +40℃ , higher relative humidities may be permitted at lower temperature,e.g.90% at +20℃. Special measures may be necessary in cases of occasional condensation due to variations in temperature.

Pollution degree 3.

Installing category: III for the main circuit , and II for other auxiliary and control circuits.

Be suitable in electromagnetic environment A.

There must be not any explosive medium, and there must be not any gas which would corrode metal or any conducting dust which would destory the insulation

The place would not be invaded by rain and snow. 

MAIN TECHNICAL PERFORMANCE INDEX

Frame			125
Type			HGM-125H		HGM-125L
Pole number			3	4	3	4
Rated current(A)                         In			5、6、10、15、16、20、30、32、40、 50、60、75、80、100、125
Rated insulation voltage(V)        Ui			AC1000
Rated impulse withstand vol(V)  Uimp			8000
Rated operational voltage (V)     Ue			690AC600
Rated ultimate short-circuit     breaking ability      (kA) Icu		660/690V	8		10
		480/500V	16		35
		440/460V	35		55
		380/415V	35		55
Operating short-circuit breaking ability    Ics (%Icu)			100		100
Category			A
Over-current tripping device			Thermal-magnetic Fixed Thermal-magnetic Adjustable （0.8、0.9、1.0）×In
Operating current of short-circuit protection(A)			16-32A 400A 40-125A 10×In
Comply standards			IEC60947-2
Operational performance (times)	Mechanical life		20000
	Electrical life		10000
Outline dimensions(mm)		L	155
		W	90	120	90	120
		H	68

NORMAL SERVICE AND MOUNTING CONDTIONS