Pt100 Relays (Options +3L506, +5L506, +8L506); What The Option Contains; Description - ABB ACS880-07 Hardware Manual

The customer connects PTC sensors to the thermistor relay and the terminals of the
auxiliary relay of the normally open contact, for example, to
•
main breaker control circuit of the drive for opening the breaker in case of motor
overtemperature or
•
appropriate digital input of the drive for tripping the drive and generating a fault
message in case of motor overtemperature or
•
customer control circuit.
See also
•
firmware manual for parameter settings
•
Wiring the thermistor relay(s) (options +L505 and +2L505)
•
circuit diagrams delivered with the drive for the actual wiring.

Pt100 relays (options +3L506, +5L506, +8L506)



What the option contains

The standard Pt100 relay option includes three (+3L506), five (+5L506) or eight (+8L506)
Pt100 temperature monitoring relays and an auxiliary relay wired to a terminal block. Other
numbers of Pt100 relays must be ordered as application engineered.

Description

The Pt100 relay is used for the overtemperature supervision of motors equipped with
Pt100 sensors. For example, three sensors measure the temperature of the motor
windings and two sensors the temperature of the bearings. The sensor resistance
increases linearly as the temperature rises. The Pt100 relay releases at an adjustable
wake-up level and indicates motor overtemperature through its change-over contact.
The Pt100 relay provides connection terminals for one Pt100 temperature sensor and
terminals of one normally open and one normally closed contact.
The customer connects Pt100 sensors to the Pt100 relays (one sensor per relay) and the
auxiliary relays of the normally open contacts of the Pt100 relays, for example, to
•
main breaker control circuit of the drive for opening the breaker in case of motor
overtemperature or
•
appropriate digital input of the drive for tripping the drive and generating a fault
message in case of motor overtemperature or
•
customer control circuit.
See also
•
firmware manual for parameter settings
•
Wiring the Pt100 relays (options +2L506, +3L506, +5L506 and +8L506)
•
Pt100 relay alarm and trip limit setting instructions on page
•
circuit diagrams delivered with the drive for the actual wiring.
Operation principle and hardware description 47
on page
137
107
on page 108