EHMVD06B EATON CUTLER HAMMER, EHMVD06B Datasheet - Page 10

• Manufacturer Part Number: EHMVD06B
• Description: Handle Mechanism
• Manufacturer: EATON CUTLER HAMMER

Specifications of EHMVD06B

• Features: Through-the-Door
• For Use With: EG Frame Series G Circuit Breakers

12
12-10
DC Switching Duty
The EG- to LG-Frame circuit breakers
are also suitable for switching dc
currents.
The NG- and RG-Frame circuit break-
ers are not suitable for dc currents
due to the solid-state overcurrent
release system.
For switching dc currents, however,
the maximum permissible dc voltage
per conducting path has to be
considered.
For voltages higher than 250 volts,
the series connection of two or three
conducting paths is required.
As the current has to flow through
all conducting paths so as to maintain
the thermal tripping characteristics,
the following circuit arrangements are
recommended. With dc, the trip values
of the instantaneous short circuit
release (“n” release) are increased
by 30 to 40%.
Series G Molded Case Circuit Breakers
15 – 2500 Amperes for UL, CSA & IEC Applications
Frame Sizes EG through LG
Table 12-4. For 3- and 4-Pole Circuit Breakers
Proposed
Circuit
For more information visit: www.eaton.com
NSI-5178a
NSI-5179a
NSI-5180
NSI-5181
M
M
M
M
Maximum
Permissible
Vdc U e
250 Vdc
440 Vdc
600 Vdc
750 Vdc
Remarks
Double-pole switching.
If there is no risk of an earth fault, or if any
earth fault which occurs is immediately elimi-
nated (earth fault monitoring), the maximum
permissible dc voltage can be 600 volts.
Double-pole switching (earth system).
The earthed pole must always be assigned to
the individual conducting path, so that two
paths are always in series in the event of an
earth fault.
Single-pole switching (earthed system).
Three conducting paths in series. The earthed
pole must be assigned to the nonswitched
conducting path.
Single-pole switching (earthed system).
Four conducting paths in series. The earthed
pole must be assigned to the nonswitched
conducting path.
November 2008
CA08101001E