| |
EFREM - Earth Fault Resistance Monitor
AT-8000
|
RHM - Rotor Health Monitor
AT-8300
|
GDS - Ground Detection System
AT-8600
|
| Monitors for Ground Fault |
Yes
|
Yes
|
Yes
|
| Monitors for Temperature (RTD's) |
No
|
Yes
|
No
|
| Current Shunt |
No
|
Yes
|
No
|
| Records Trends Over Time |
Yes
|
Yes
|
No
|
| Archiving Capability |
Yes
|
Yes
|
No
|
| Transmitter Mounting |
End-of-shaft / split clamp collar
|
End-of-shaft
|
End-of-shaft
|
| Field Voltage |
Measurement Range
|
0–500 VDC
|
0–500 VDC
|
0–750 VDC
|
|
Maximum Transient without Damage
|
1000 V for 5 seconds
|
1000 V for 5 seconds
|
1500 V for 5 seconds
|
| Environment |
Ambient Temperature
|
32–185 °F / 0–85 °C at Rotor Module; 32–122 °F/0–50 °C at Receiver Unit
|
32–185 °F/0–85 °C at Rotor Module; 32–122 °F/ 0–50 °C at Receiver Unit
|
-40–194 °F/-40–90 °C at Rotor Module; -40–140 °F/-40–60 °C at Receiver Unit
|
|
Rotor Speed
|
0–3600 RPM nominal; 4320 RPM max
|
0–3600 RPM nominal; 4320 RPM max
|
0–3600 RPM nominal; 4320 RPM max
|
| Receiver Power |
85–250 VAC 50/60Hz or
125–375 VDC <20W
|
85–250 VAC 50/60Hz or
125–375 VDC <20W
|
100–240 VAC 50/60 Hz or
24 VDC
|
| Power to Transmitter |
Induction
|
Induction
|
Induction
|
| Machine Connections |
Positive Field Voltage;
Negative Field Voltage;
Rotor Ground
|
Positive Field Voltage;
Negative Field Voltage;
Rotor Ground; Channel 1 Shunt current + and -; Channel 2 Shunt current + and -; RTDs
|
Field Negative Terminal;
Rotor Ground
|
| Outputs |
Alarm Relays; 4-20 mA; Voltage
|
Alarm Relays; 4-20 mA; Voltage
|
Alarm Relays
|
|
For more information on these systems, see Ground Fault Protection.
|