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
|