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CHAPTER 1: GETTING STARTED
ABOUT YOUR NEW RTT UNIT
RTT DESKTOP TEST SET– INSTRUCTION MANUAL
7
1.2.5
RTT Unit Specifications
LED INDICATOR LIGHTS
A single green LED is provided for each digital input from and output to the relay under
test.
CONTROL POWER
RANGE:
Nominal AC Voltage:.....................................100 V to 240 V AC at 50/60 Hz
Min/Max AC Voltage:.....................................85 V / 250 V AC at 47 to 63 Hz
, 70 mA max.
AT 120 VAC INPUT
Nominal: ............................................................3 VA
Maximum:..........................................................5 VA
AT 240 VAC INPUT
Nominal: ............................................................6 VA
Maximum:..........................................................14 VA
FUSE
1
5 × 20mm, 80 mA, 250V
Time-lag fuse
Manufacturer and part number: ...........LITTELFUSE: 218.080
CURRENT OUTPUT
AT 120 VAC INPUT
Range: ................................................................0 to 3 A AC at 0.08
Ω
CT Relay Burden
AT 240 VAC INPUT
Range: ................................................................0 to 6 A AC at 0.08
Ω
CT Relay Burden
Tolerance: ..........................................................±10%
VOLTAGE OUTPUT
AT 120 VAC INPUT
Range: ................................................................0 to 40.0 VAC
AT 240 VAC INPUT
Range:..................................................................0 to 80.0 VAC
Tolerance: .........................................................±10%
RTD OUTPUT (NON-LINEAR)
For Wire Type:..................................................3 wires
For Sensor Type: .............................................100
Ω
platinum, 100
Ω
nickel, 120
Ω
nickel
Resistance: ........................................................110 to 160
Ω
Tolerance: ..........................................................±5%
DIGITAL INPUTS
DRY:
Contact Resistance: ......................................< 10 m
Ω
Insulation Resistance: ..................................> 1000 M
Ω
WET:
DC Voltage:........................................................23.4 VDC @ 200mA
Tolerance: ..........................................................±5%
1. Fuse Replacement:
- Disconnect Power Supply and remove fuse from its holder.
- Replace with a 80 mA, 250 V, time-lag fuse. Use ONLY fuses indicated in above specifications.