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Instructions
tors are not recommended. Terminals can accept
aluminium conductors but the conductor sur-
face has to be clean and the oxidation must be
removed and sealed by neutral acid free Vase-
• Fuses
- Branch circuit protection:
In order to protect the installation against elec-
trical and fire hazard, all branch circuits in an
installation, switch gear, machines etc., must be
shortcircuit and overcurrent protected according
to the national/international regulations.
- Short circuit protection:
The frequency converter must be protected
- UL compliance (380-480 V, 525-600 V)
CD 302
kW
Type RK1
4.0
KTS-R20
5.5-7.5
KTS-R30
11.0
KTS-R40
15.0
KTS-R50
18.0
KTS-R60
22.0
KTS-R80
- Non UL compliance :
If UL/cUL is not to be complied with, we recommend using the following fuses, which will ensure compliance with EN50178.In case of malfunction, not following the
recommendation may result in unnecessary damage of the frequency converter.
CD 302
3K0-3K7
3K0-4K0
5K5-7K5
11K
15K
18K
22K
* : Max. fuses - see national/ international regulations for selecting an applicable fuse size.
• Electrical motor compressor protection
The electrical motor compressor protection is
fully provided by the CD302 frequency converter.
- CD302 makes through an Electronic current
measurement anti-overload and lock-rotor motor
compressor protection (see description in the
application manual).
- The frequency converter is protected against
short-circuits on compressor terminals U, V, W.
- If a mains phase is missing, the frequency
converter trips or issues a warning (depending on
the load).
- If a motor compressor phase is missing, the
frequency converter trips.
- The frequency converter is protected against
earth faults on compressor terminals U, V, W.
- The frequency converter is protected against
short circuits on compressor terminals U, V, W.
- Monitoring of the intermediate circuit voltage
ensures that the frequency converter trips if the
intermediate circuit voltage is too low or too high.
© Danfoss | DCS (CC) | 2019.04
line grease before the conductor is connected.
Furthermore, the terminal screw must be retigh-
tened after two days due to the softness of the
aluminium. It is crucial to keep the connection a
against short-circuit to avoid electrical or fire
hazard. Danfoss recommends using the fuses
mentioned below to protect service personnel or
other equipment in case of an internal failure in
the drive. The frequency converter provides full
short circuit protection in case of a short-circuit
on the motor compressor output.
- Over current protection:
Provide overload protection to avoid fire hazard
Bussmann
Type J
Type T
JKS-20
JJS-20
JKS-30
JJS-30
JKS-40
JJS-40
JKS-50
JJS-50
JKS-60
JJS-60
JKS-80
JJS-80
Max. fuse size
32A*
20A*
32A*
63A*
63A*
63A*
80A*
• Access to Control Terminals
A1, A2 and A3 enclosures
gas tight joint, otherwise the aluminium surface
will oxidize again.
due to overheating of the cables in the installa-
tion. The frequency converter is equipped with
an internal over current protection that can be
used for upstream overload protection (UL-appli-
cations excluded). See par. 4-18. Moreover, fuses
or circuit breakers can be used to provide the
over current protection in the installation. Over
current protection must always be carried out
according to national regulations.
SIBA
Littel fuse
Type RK1
Type K1
5017906-020
KLS-R20
5012406-32
KLS-R30
5014006-040
KLS-R40
5014006-50
KLS-R50
5014006-63
KLS-R60
100 KLS-R80
KLS-R80
Voltage
200-240 V
380-480 V
380-480 V
380-480 V
380-480 V
380-480 V
380-480 V
A5, B1 and B2 enclosures
Ferraz- Shawmut
Type CC
Type RK1
ATM-R20
A6K-20R
ATM-R30
A6K-30R
A6K-40R
A6K-50R
A6K-60R
A6K-80R
Type
type gG
type gG
type gG
type gG
type gG
type gG
type gG
3
4
2
1
130BA012.11
1. 10 pole plug digital I/O
2. 3 pole plug RS485 Bus
3. 6 pole analog I/O
4. USB Connection
AN000086420674en-000201 | 5
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