ABB ACS880-07, Руководство по оборудованию

Страница: 105 / 274

Wiring the PTC thermistor relay(s) (oL505, +2L505, +L513 and +2L513)
The external wiring of 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 oL513
and +2L513, see
ATEX-certified motor thermal protection functions for cabinet-built ACS880
drives (oL513+Q971 and +L514+Q971) user's manual (3AXD50000014979 [English]).
102 Electrical installation
Wiring the thermistor relay(s) (oL505 and +2L505)
The external wiring of 2L505 (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.
1
2
3
4
5
6
7
8
9
10
11
12
25
26
27
28
T
T
6
5
1
2
3
4
5
6
2
3
1
4
X506
1...n x PTC
1...n x PTC
PTC sensors monitored by relay K74.
R
G
= R
1
+ R
2
+ R
N
< 1.5 kohm.
1
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.
2
PTC sensors monitored by relay K75.
R
G
= R
1
+ R
2
+ R
N
< 1.5 kohm.
3
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.
4
Overheat indication from relay K74: overtemperature =
contact open. 5
Overheat indication from relay K75: overtemperature =
contact open. 6
Electrical installation 105