Projoy PEDS150-EL55R-4(4M25) DC Isolator Switch 55A 4 Pole 2 String 1500V DC Lockable Rotary Handle for Solar PV

Description

1500V DC isolator with a lockable handle

The Projoy PEDS150-EL55R-4(4M25) is an EL-type DC isolator switch with 4 poles for isolating two PV strings. It pairs a 1500V DC insulation rating with a 55A thermal current, DC-PV1 and DC-PV2 ratings, and a handle that locks in position.

Key Features

• SAA certificate number:
• 1500V DC rated insulation voltage (Ui)
• 55A rated thermal current (Ith)
• 4 poles, wired for 2 PV strings
• Utilisation categories DC-PV1 and DC-PV2 to IEC/EN 60947-3
• Rotary handle with lock
• Switching time under 5ms, self-cleaning contacts
• Terminal capacity: 4 to 16mm², solid or standard
• Full-load operation from -40°C to +70°C
• Shaft and mounting nut sealed to IP66

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Why it Matters

Current depends on string voltage
A DC isolator does not carry its full thermal current at every voltage. Projoy rates this switch at 55A up to 600V DC under DC-PV1, falling to 33A at 1000V DC and 18A at 1500V DC. Under the DC-PV2 category the figures run from 55A at 300V DC to 10A at 1500V DC. Match the rating table to the string's maximum voltage and current before you select a model.

Two strings, four poles
Projoy's schematic for the 4 pole switch shows two separate positive and negative pairs, so one switch isolates two PV strings. As standard the rotary handle is OFF at the 12 o'clock position and ON at 3 o'clock, and the R in the part number denotes the lockable version.

Built for hot conditions
Projoy's temperature derating curve holds 100% of rated current up to 70°C, then reduces it to 92% at 75°C, 84% at 80°C and 76% at 85°C. Storage is rated from -40°C to +85°C. The switch is rated for 10,000 mechanical operations and 300 electrical operations, at up to 120 operations per hour.

Q: How many solar strings can the Projoy PEDS150-EL55R-4 isolate?
A: Two. The 4 pole configuration switches two positive and negative pairs, which Projoy lists as two PV strings.

Q: What current can the PEDS150-EL55R-4 switch at 1000V DC?
A: Projoy rates it at 33A under DC-PV1 and 32A under DC-PV2 at 1000V DC. The 55A rating applies up to 600V DC (DC-PV1) or 300V DC (DC-PV2).

Q: What cable size fits the PEDS150-EL55R-4 terminals?
A: The M4 terminals take solid or standard conductors from 4 to 16mm², tightened to 1.2 to 1.8 Nm. Size the cable for your installation to AS/NZS 3008.1.1.