High Potential Test (Insulation Strength Test); Protection Devices; Se-E1; Se-I1 - Bitzer CSH6553-35Y Instructions De Service

as an option. For detailed information, see manual
SH-170.
The CS.95 models are generally equipped with star-
delta motors (Y/Δ).
Part-winding motors (PW)
Starting modes:
• Part-winding start to reduce the starting current
• Direct start
Time delay until switch-on of the 2nd part winding: max.
0.5 s!
Make the appropriate connections! Mixed-up arrange-
ment of the electrical connections lead to opposite
fields of rotation or to fields of rotation out of phase and
therefore to a motor lock!
Connect motor terminals on the cover of the terminal
box according to the instructions.
Absolutely observe the sequence of the part windings!
• 1st part winding (contactor K1): connections 1 / 2 / 3
• 2nd part winding (contactor K2): connections 7 / 8 / 9
• Winding repartition 50%/50%.
• Motor contactor selection:
– 1st contactor (PW 1): 60% of the max. operating
current.
– 2nd contactor (PW 2): 60% of the max. operating
current.
Star-delta motor
The time delay between the switch-on of the com-
pressor and the switch-over from star to delta operation
shall not exceed 2 s.
Make the appropriate connections!
Mixed-up arrangement of the electrical connections
lead to short-circuit!
Information
Rate the mains contactor and the delta con-
tactor at min. 60% and the star contactor at min.
33% of the max. operating current.

5.3 High potential test (insulation strength test)

The compressor was already submitted to a high po-
tential test in the factory according to EN 12693 or ac-
cording to UL984 or UL60335-2-34 for the UL model.
44
NOTICE
!
!
Risk of defect on the insulation and motor fail-
ure!
Never repeat the high potential test in the same
way!
However, a test at reduced voltage is possible (e.g.
1000 V). The reason for this limitation is, among others,
the influence of oil and refrigerants on the dielectric
strength.

5.4 Protection devices

NOTICE
!
!
Potential failure of the compressor protection
device and the motor due to improper connec-
tion and/or faulty operation!
The terminals M1-M2 or T1-T2 on the com-
pressor and B1-B2 on the protection device as
well as its two orange cables must not come
into contact with the control voltage or operating
voltage!
5.4.1

SE-E1

This protection device is incorporated in the terminal
box (standard). The cable connections to the motor and
oil temperature PTC sensors and to the motor pins are
permanently wired. 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

SE-i1

This protection device with extended monitoring func-
tions can be installed as an option on all CSH and
CSW compressors.
Monitoring functions:
• Temperature monitoring.
• Monitoring of the PTC control circuit to detect any
short-circuit or line break/sensor failure.
• Rotation direction monitoring.
• Monitoring of phase failure and asymmetry.
• Monitoring of the maximum cycling rate.
For further details, see the Technical Information
CT-110.
SB-170-7