Wiring The Ptc Thermistor Relay(S) (Options +L505, +2L505, +L513, +2L513) - ABB ACS880-37 Hardware Manual

104 Electrical installation

Wiring the PTC thermistor relay(s) (options +L505, +2L505, +L513, +2L513)

The external wiring of option +2L505 and +2L513 (two thermistor relays) is shown below.
For example, one relay can be used to monitor the motor windings, the other to monitor
the bearings. The maximum contact load capacity is 250 V AC 10 A. For the actual wiring,
see the circuit diagram delivered with the drive. For instructions on commissioning options
+L513 and +2L513, see ATEX-certified motor thermal protection functions for cabinet-built
ACS880 drives (options +L513+Q971 and +L514+Q971) user's manual
(3AXD50000014979 [English]).
X506
T
1
1 1...n × PTC
2
3
2
4
5
6
T
7
1...n × PTC
3
8
9
4
10
11
12
25
26
27
28
1 PTC sensors monitored by relay K74.
R = R + R
G 1
2 External reset for relay K74.
Note: With +L505 and +2L505, the terminals
can be bridged for automatic reset. However,
this is not allowed by ATEX regulations.
3 PTC sensors monitored by relay K75.
R = R + R
G 1
4 External reset for relay K75.
Note: With +L505 and +2L505, the terminals
can be bridged for automatic reset. However,
this is not allowed by ATEX regulations.
5 Overheat indication from relay K74:
overtemperature = contact open.
6 Overheat indication from relay K75:
overtemperature = contact open.
5
6
+ R < 1.5 kohm.
2 N
+ R < 1.5 kohm.
2 N