Acs880-17Lc/37Lc Drives Without A Main Breaker; Safety Component Types; Safety Block Diagrams; Diagram 1: Acs880-07 Drives, Frames R6 - R11 And Acs880-17/-37 Drives, Frame R8, With One Contactor (A145 - Af1250) Or Circuit Breaker - ABB Q952 User Manual

Note: If T1 > 1a is needed in low demand mode of operation, SIL 1 / PL c levels are used
and PFD is calculated separately.

ACS880-17LC/37LC drives without a main breaker

Note: ACS880-17LC/37LC drives can be delivered without a factory-installed main breaker.
Customer-installed components are not included in the safety data calculations. These
values must be added to the calculations by the customer.
ACS880-17LC/ Circuit
37LC type break-
er
-17LC/37LC without -
air circuit breaker
delivery
1) PFH values are according to EN ISO 13849.
2) DC for low demand mode is 90% (determined by the DC of the worst component in the subsystem).
3) See the recommendation of use CNB/M/11.050 published by the European co-ordination of notified bodies for lower T1
requirement.
4) T1 = 20a is used with high demand mode of operation. T1 = 1a is used with low demand mode of operation. See also
section Proof test interval.
Note: If T1 > 1a is needed in low demand mode of operation, SIL 1 / PL c levels are used
and PFD is calculated separately.
￭

Safety component types

Safety component types as defined in IEC 61508-2:
• emergency stop button: type A
• safety relay(s): type A
• main contactor(s): type A
• main breaker: type A.
￭

Safety block diagrams

The components that are included in the safety data calculations are shown in the safety
block diagram(s) below. The components not included in the delivery are not included in
the safety data calculations.
The components that are included in the safety circuit are shown in the safety block diagrams
below for different drive types.
Diagram 1: ACS880-07 drives, frames R6 - R11 and ACS880-17/-37 drives, frame R8,
with one contactor (A145 – AF1250) or circuit breaker
E-stop
E-stop
safety
button
relay
SIL / SC PL
PFH
SIL-
[1/h]
CL
2 3 d 7.3E-
7
Extension Auxiliary
safety safety
relay relay
1) 2)
PF- Cat.
DC
Davg
[%]
8.1E- >90 2
4
Main
contactor
or main
breaker
Technical data 43
3) 4)
HFT CCF Mis-
T1
sion
[a]
time
[a]
0 65 20 20/1
3AXD10000097591 Rev E