DC Contactors for frequency inverters

GFDC series DC contactor is used for DC circuits with rated DC working voltage up to DC48V and working current up to 800A. The products are mainly used in frequency inverters, energy storage welding machines, electric heating and other occasions. When the working voltage is connected to the circuit above DC600V, it is suitable for switching the buffer resistance of the main circuit of the inverter.

Structural characteristics
1. The main circuit is DC, and the control circuit is AC 220V, 380V.
2. All dustproof, the protection grade reaches IP54.
3. The action mechanism is a direct-acting type, and the contacts are double breakpoints with arc-extinguishing contacts.
4. Natural arc extinguishing, the arcing distance is zero.
5. Small size, light weight, low energy consumption and high reliability.

Working conditions and installation conditions
1. Ambient temperature: -25℃ ~ +55℃
2. Relative humidity: +25℃ up to 90%
3. Vibration frequency at the fixed place: 1~50Hz (frequency 1~10Hz, amplitude 25/f; frequency 10~50Hz; amplitude 250/f2)
4. Impact acceleration: 30m/s2
5. Installation direction: vertical installation
6. Installation method: screw installation
7. Working system: uninterrupted working system (DC-1)

8. Operating frequency: no more than 1200 times per hour.

Paramters

Type		GFDC-100	GFDC-200	GFDC-265	GFDC-400	GFDC-600	GFDC-800
Rated insulation voltage		1500 V
Power frequency withstand voltage		3500 V
Main circuit (DC)	Nominated thermal current Ith(A)	100 A	200 A	265A	400A	600A	800A
	Rated working voltage	DC48V
	Rated working current	100 A	200 A	265A	400A	600A	800A
	Voltage drop while contacting	Less than 80 MV（100A Load）
Coil	Coil voltage	220V or 380VAC					24VDC
	Pull in voltage	85%—110% Us
	Release voltage	20%—75% Us
	Pull in power	76VA		110VA		230VA
	Maintain power	10VA		11VA		22VA