EP
388
EP-RELAYS
HIGH V OL T AGE AND
CURRENT CUT-OFF
CAPACITY IN A
COMPACT PACKAGE
150A 2 Form A
150A 1 Form A
60A
FEATURES
• Control of large voltages and currents
The relays have a sealed construction
that is filled with a hydrogen gas compound, and use a permanent magnet to
establish a magnetic path for the arc. This
allows them to switch high-level DC voltages of up to 400V DC.
• Compact size and light weight
The capsule contact construction is filled
with a gas that has excellent thermal dissipation and insulation characteristics.
Because of this we have been able to reduce the contact gap to one tenth that of
conventional relays, and produce a compact and light design.
• No arc space is required: size including arc space 1/9 (compared to conventional contactors)
The arc is not exposed to the outside,
therefore, no arc space is not required.
• Safety construction
The arc is not exposed, therefore, the
contactor is explosion proof and intrinsically safe.
• Quiet: operation noise 1/4 (compared
to conventional contactors).
Along with the above-mentioned miniaturization, the operation noise has been reduced to 70dB, and, in addition, the
operation noise remains unchanged
when a current of 1000A or more is interrupted.
• High contact reliability
The contact part is hermetically sealed,
hence the contact resistance remains stable regardless of the ambient conditions.
• Mounting direction is not specified
The weight of the movable parts is light,
and also the restoring force is large,
hence the contactor is relatively unaffected by gravity.
• Line-up of indicator types (150A T ype
only)
1 Form A and 1 Form B types with indicators for detecting welding of the main contacts are available.
• 12 and 24V DC coil voltage types are
available.
• Screw terminal blocks for easy wiring.
SPECIFICATIONS
Contact
Notes:
Same specifications as the 12 V type.
#1
Condition: Nominal switching 100cycles, each cut off 2,500A
#2
Conditions: Varistor used for coil surge absorption. Note: if a diode is used the life will be lower.
Type 150A type 60A type
Arrangement 1 Form A, 2 Form A 1 Form A
Rating
Nominal switching capacity
(resistive load)
150A 400V DC
150A 277V AC
60A 400V DC
60A 277V AC
Short term current 300A (10min)(harness wire: 40mm
2
) 120A (15min)(harness wire: 15mm
2
)
Max. cut-off current 2,500A 300V DC (3 cycles)
#1
600A 300V DC (5 cycles)
Overload opening/closing rating 600A 400V DC (Min. 1,000 cycles) 180A 400V DC (Min. 100 cycles)
#2
Reverse cut-off current –200A 200V DC (Min. 500 cycles) –60A 200V DC (Min. 1,000 cycles)
#2
Contact voltage drop (Max.) 0.1V (When current [is 150A per 1] contact set) 0.1V (When current [is 60A per 1] contact set)
Nominal operating power 35W (Inrush, approx 0.1s) 5W ( Stable ) Max. 5W
Expected life
(min.
operations)
Mechanical 10
5
2 ×
10
5
Electrical
3 × 10
3
150A 400V DC
(L/R
&
1ms)
3 × 10
3
60A 400V DC
(L/R
&
1ms
#2
)