High Potential Test (Insulation Strength Test); Protection Devices; Se-E1; Hs.85: Protection Devices For Operation With Fi - Bitzer HS.8551 Instructions De Service

fields of rotation out of phase and therefore to a motor
lock!
Winding partition 50%/50%.
Motor contactor selection:
1st contactor (PW 1): 60% of the max. operating cur-
rent.
2nd contactor (PW 2): 60% of the max. operating cur-
rent.
Star-delta motor
Compressors of the HS.95 series are equipped with
star-delta motors.
Activation of the contactors and the time delay between
switching on the compressor and switching from star
operation to delta operation is integrated into the com-
pressor electronics (CM-SW-01).
Make the connections correctly!
Wrong electrical connections will lead to short-circuit!
Rate the mains contactor and the delta contactor at
min. 60% and the star contactor at min. 33% of the
max. operating current.

5.3 High potential test (insulation strength test)

The compressors were already submitted to a high po-
tential test in the factory according to EN12693 or ac-
cording to UL984 or UL60335-2-34 for the UL model.
NOTICE
!
!
Risk of defect on the insulation and motor fail-
ure!
Never repeat the high potential test in the same
way!
A repeated high potential test may only be carried out
with max. 1000 V AC.

5.4 Protection devices

On HS.95 compressors, all protective functions men-
tioned here are performed by the CM-SW-01 com-
pressor module or connected to it (OLC- D1-S, HP, LP
etc.). Please refer to Technical Information ST-150 for
information on all connections on the compressor mod-
ule.
WARNING
Risk of electric shock!
Before performing any work in the terminal box
of the compressor: Switch off the main switch
and secure it against being switched on again!
Close the terminal box of the compressor before
switching on again!
SB-110-3
NOTICE
!
!
Potential failure of the protection device and the
motor due to improper connection and/or faulty
operation!
Connect properly according to the schematic
wiring diagrams and check the connections for
tight seat.
The cables and terminals of the PTC control cir-
cuit must not come into contact with the control
voltage or operating voltage!
NOTICE
!
!
The compressor module may be damaged or
fail!
Never apply any voltage to the terminals of CN7
to CN12 – not even for test purposes!
The voltage applied to the terminals of CN13
must not exceed 10 V!
The voltage applied to terminal 3 of CN14 must
not exceed 24 V! Do no apply voltage to the
other terminals!
5.4.1

SE-E1

This protection device is incorporated as standard in
the terminal box of all HS.53 .. HS.85 compressors and
CSH, CSW compressors. In the state of delivery, the
cables for the monitoring of motor and oil temperature,
rotation direction and phase failure are connected to
the terminal plate. Other connections according to the
wiring diagram in the terminal box, see manual SH-170
and Technical Information ST-120.
Monitoring functions:
• Temperature monitoring.
• Rotation direction monitoring.
• Phase failure monitoring.
5.4.2

HS.85: Protection devices for operation with FI

SE-i1 or SE-E2 is required for operation with frequency
inverter (FI) and soft starter (at a ramp time < 1 s). For
schematic wiring diagrams for FI operation with SE-i1,
see Technical Information CT-110. For schematic wir-
ing diagrams for FI operation with SE-E2, see Tech-
nical Information ST-122.
5.4.3

Safety devices for pressure limiting (HP and LP)

• These safety devices are required for securing the
compressor's application range in order to avoid un-
acceptable operating conditions.
• Do not connect any safety devices to the mainten-
ance connection of the shut-off valve!
15