Two Changeover Electromagnetic Direct Current Relay

Neutral Electromagnetic Relay

• Hermetically sealed electromagnetic direct current relay with two changeover contacts.
• It is applied to switch electric circuits of double current with frequency from 50 Hz to 1100 Hz in electronic automatic telephone stations МТ-20 type or in similar ones.
• Suitable for point-point wiring and printed circuit wiring.
• It switches current from 0.04 А to 1.25 А.
• Relay max mass 10 g.
• Technical specifications RF4.500.473 ТU.
• Minimum term of service: 15 years.

Technical data and operating factors

• Power supply voltage: according to the table.1.
• Switching modes: according to the table.2.
• Contacts resistance: ≤1.5 Ohm .
• Action time: max 6 msec.
• Release time: max 3 msec.
• Insulation resistance:: between current-carrying circuits, between current-carrying circuits and body frame:
• 200 Mohm - under average climatic conditions;
• 50 Mohm - at max temperature;
• 10 Mohm - at high humidity;
• Between coil and body frame; 5 Mohm - at high humidity.
• Insulation strength: (effective value)
• between current-carrying circuits, between current-carrying circuits and body frame: 500 V - under average climatic conditions;
• 350 V - at high humidity;
• 260 V - at reduced air pressure; between current-carrying circuits
• 350 V - under average climatic conditions;
• Vibration stability: from 10 to 50 Hz with amplitude up to1 mm; from above 50 to 80 Hz with acceleration to100 m/s2(10g).
• Impact resistance: to 100g.
• Environmental temperature: from 253К (-20^oС) to 343К (+70^oС).
• Relative humidity: to 98% at 308К ( +35^oС )
• Air pressure: from 53·103 Pа ( 400 mm of mercury) to 107·103 Pa (800 mm of mercury )

Main Electrical Data :