Projoy PEDS150-EL55R-4 DC Isolator Switch 55A 4 Pole 2 String 1500V DC Insulation Lockable EL Enclosure Type DC-PV1 DC-PV2

Description

Lockable 55A DC isolation for two strings

The Projoy PEDS150-EL55R-4 is a 4 pole DC isolator switch rated to 1500V DC insulation and 55A thermal current. It switches two DC strings together under one lockable handle.

Key Features

• SAA certificate:
• Rated insulation voltage (Ui): 1500V DC
• Rated thermal current (Ith): 55A
• 4 DC poles, 2 strings
• DC-PV1: 55A at 600V, 45A at 800V, 33A at 1000V DC
• DC-PV2: 50A at 600V, 40A at 800V, 32A at 1000V DC
• Lockable version (R), front contact
• Enclosure (EL) installation type
• Terminals: 4-16mm² solid or standard conductors
• Operating temperature: -40°C to +85°C

Secure yours now for your next DC isolation job.

Why it Matters

Ratings that fall with voltage
This isolator's switching current drops as the system voltage rises, so select it against the string voltage, not just the 55A headline. Projoy rates this 55A, 4 pole switch to IEC/EN 60947-3 and GB/T 14048.3. Under DC-PV1 it handles 55A at 600V, 45A at 800V, 33A at 1000V and 1200V, and 18A at 1500V DC. Under DC-PV2 the figures are 55A at 300V, 50A at 600V, 40A at 800V, 32A at 1000V, 18A at 1200V and 10A at 1500V DC.

Two strings, one lockable handle
Projoy's 4 pole schematic shows two separate string circuits (+1/-1 and +2/-2) switched together. The R version adds a lock, and the switch has 8mm contact distance per pole with 10,000 operations of mechanical life. Projoy lists a rated impulse withstand voltage of 8,000V, a short-time withstand current of 780A for 1s and a short-circuit making capacity of 1,200A.

Heat and installation
Full rated current applies up to 70°C ambient. Above that Projoy's derating curve drops to 92% at 75°C, 84% at 80°C and 76% at 85°C. Terminal screws are M4, tightened to 1.2-1.8 Nm, and Projoy rates the switch's shaft and mounting nut to IP66 (Projoy publishes no enclosure IP rating for this part). The datasheet gives pollution degree 3 and overvoltage category II.

Q: What current can the Projoy PEDS150-EL55R-4 switch at 1000V DC?
A: Projoy rates it at 33A at 1000V DC under DC-PV1 and 32A at 1000V DC under DC-PV2, to IEC/EN 60947-3.

Q: How many strings does the PEDS150-EL55R-4 isolate?
A: Two. It has four DC poles, and Projoy's 4 pole schematic shows two string circuits, +1/-1 and +2/-2, switched together.

Q: Does the 55A rating hold in high temperatures?
A: Full rated current applies up to 70°C ambient. Projoy's curve then derates it to 92% at 75°C, 84% at 80°C and 76% at 85°C, the top of the operating range.