Technical Parameters
Parameter Category Specification
Product Family / Type Compact Multifunction Protection Relay
Standard Compliance IEC 60255, IEC 60947-1
Rated Auxiliary Supply Voltage (Us) 48 - 250 V DC / 48 - 240 V AC, 50/60 Hz (Auto-ranging, suffix -70)
Rated Current Input (In) 1 A AC (This is defined by the -600- in the type code).
Configurable Relay Functions Set via 8-position DIP switch on front:
• Three-phase overcurrent (I>)
• Two-phase overcurrent (I>)
• Single-phase overcurrent (I>)
• Sensitive earth-fault (I0>)
• Three-phase overcurrent + Earth-fault (I> + I0>)
Protection Characteristics
• Operate Value Range Phase: 0.5 - 5.0 x In (in 8 steps)
Earth: 0.02 - 0.5 x In (in 8 steps)
• Time Delay Definite Time (DT). Adjustable via potentiometer: 0.06 - 3.0 seconds.
• Reset Time Approx. 60 ms (Instantaneous reset).
Output Contacts
• Trip Relay 1 Changeover (CO) contact (SPDT).
• Rated load: 8 A, 250 V AC / 5 A, 30 V DC.
• Signal Relay 1 Changeover (CO) contact (SPDT).
• Can be configured for trip repetition or as a separate alarm.
Binary Inputs 1 programmable input. Can be used for Remote Reset or Blocking.
Indications 3 LEDs:
- Green (PWR): Power ON.
- Yellow (ALARM): Pre-alarm or start signal.
- Red (TRIP): Protection has operated.
Measurement Monitors phase currents and calculates maximum value for protection. No local display of numeric values.
Operate Time Accuracy ±5% of set value or ±30 ms, whichever is greater.
Burden < 0.2 VA per current input at In.
Electrical Durability Output contacts: ≥ 100,000 mechanical operations; ≥ 10,000 electrical operations at rated load.
Isolation 4 kV RMS between all circuits (supply, current inputs, outputs).
Operating Temperature -25°C to +55°C
Storage Temperature -40°C to +85°C
Mounting Standard DIN rail (35mm).
Housing Material Self-extinguishing thermoplastic (Polyamide).
Protection Rating IP40 (front), IP20 (terminals).
Dimensions (W x H x D) Approx. 70 mm x 122 mm x 116 mm (4 module width = 70mm).
Weight Approx. 0.45 kg.
Certifications CE, cULus, RoHS.
The ABB PSR3-600-70 is a compact, versatile, and economical multifunction protection relay from the core ABB PSR (Protection, Signaling and Control) series. Designed as a universal building block, it provides essential protection functions for a wide range of applications, including feeder protection, transformer protection, and general equipment protection in low-voltage and medium-voltage systems.