REV : E
REV DATE : 2/23
10031432
Page :1 /1
Form No.: DPN001040_REV4
LIEBERT® HEAT REJECTION SKID
ELECTRICAL FIELD CONNECTIONS
ACCEPTABLE & UNACCEPTABLE POWER SUPPLIES FOR
ALTERNATE EC FANS
POWER SUPPLY REQUIREMENTS FOR 380V-575V UNITS:
The 380-575volt unit is designed to operate with Wye-connected power with a solidly grounded neutral. It will not operate properly with Wye-
connected power with high-resistance (or impedance) ground or with Delta-connected power. A separate neutral wire is not required to be
run to the Liebert® MCV Condenser.
Acceptable Power Supplies—380-575V Nominal Units
• 380-575V wye with solidly grounded neutral and 277V line-to-neutral
Unacceptable Power Supplies— 380-575V Nominal Units
• Wye with high-resistance (or impedance) ground
• Delta without ground or with floating ground
• Delta with corner ground
• Delta with grounded center tap
Note: Service Kit Number for Liebert® Heat Rejection Skids
1. Multi-wing EC Fans must use Service Kit number 10031901P1S.
2. High-Ambient Multi-wing EC Fans must use Service Kit number 10033869P1S.
3. Rosenberg EC Fans must use Service Kit number 10027590P1S.
4. No other EC Fan replacement kit part number allowed.
PHASE B
PHASE A
PHASE C
380-575 Volt Delta Power Supply Connection
PHASE A
PHASE B
NEUTRAL
A separate neutral wire is not required
to be run to the Liebert® MCV Condenser
PHASE C
Wye Power Supply Connection
GROUND
ACCEPTABLE:
UNACCEPTABLE:
380-575V Wye with High Resistance Ground Supply Connection
PHASE C
PHASE B
PHASE A
REACTANCE
To Next Page
Loading...
