Operating Procedures
RFD-200 S2™
2
1.2 Functional Description
The RFD-200 S2 is designed specifically to test single-phase (over/under) voltage and current
protection relays. Since the current source is capable of outputting up to 100A, the RFD-200 is
ideal for testing electromechanical protection relays.
The RFD-200 S2 can also be used as an AC current source and AC or DC voltage source. Other
applications include testing CT ratios, and testing CT excitation curves.
The built-in timer can also be used as an event timer. Independent Start and Stop inputs allow
the timer to be used in different timing applications.
Three auxiliary power supplies (24Vdc, 124Vdc, 240Vac) allows the RFD-200 S2 to power
electronic relays under test.
1.3 Furnished Test Accessories
The Model RFD-200 S2 is supplied with a power cord, one set of 8-foot current cables, one 8-
foot timer start cables, one 8-foot timer stop cables, one 8-voltage cables, one ground cable, and
a duffel bag. A hard shipping case is also available as an optional item.
AC Current Output
Range
No-Load Voltage
Load Voltage
Load Current
Load/Unload Times
10A
90Vac
75Vac
10A
2 min / 15 min
40A
25Vac
20Vac
40A
1 min / 15 min
100A
10Vac
7.25Vac
100A
1 min / 15 min
100A
10Vac
3Vac
250A
1 sec / 5 min
AC Voltage Output
Range
No-Load Voltage
Load Voltage
Load Current
Load/Unload Times
240
260
240Vac
3A
10 min / 45 min
DC Voltage Output
Range
No-Load Voltage
Load Voltage
Load Current
Load/Unload Times
300Vac
300Vac
250Vac
2A
10 min / 45 min
Auxiliary Power Supply Voltage Outputs
Range
No-Load Voltage
Load Voltage
Load Current
Load/Unload Times
24Vdc
28Vdc
24Vdc
1A
Continuous
124Vdc
136Vdc
130Vdc
1/4A
Continuous
240Vac
260Vac
250Vac
1/8A
Continuous
RFD-200 Timer Display
Range
Resolution
Accuracy
0 to 9.999 Sec
1 ms
?
1 ms
10.00 to 99.99
10 ms
?
10 ms
100.00 to 999.999 sec
100 ms
?
100 ms
RFD-200 Timer Cycle Display
Range
Resolution
Accuracy
0 to 9.999 Cycles
0.1 cycles
?
1 ms
1000 to 49,999 (50 Hz)
1 cycle
?
10 ms
1000 to 59,999 (60Hz)
1 cycle
?
100 ms
