Safety Breaker Symbol. Ti and tw instrument connections on piping shall be 1 screwed unless otherwise noteo. 1200 a identifies the drawout circuit breaker represented by the symbol as a 1200 ampere circuit breaker.
Breathing valve or pressure vacuum relief valve. Pressure relief valve symbol adinserter 1 vacuum relief valve. 6 starting circuit breaker 7 rate of change relay 8 control power disconnecting device 9 reversing device 10 unit sequence switch 11 multifunction device 12 overspeed device 13 synchronous speed device 14 underspeed device 15 speed or frequency matching device 20 elect.
All ft pa pc.
Indicates that the transformer represented by the symbol is connected delta wye. Ti and tw instrument connections on piping shall be 1 screwed unless otherwise noteo. Low voltage circuit breaker a type mcp motor circuit protector tm thermal magnetic ss solid state b frame size manufacturer to determine frame size unless indicated d trip setting at amp trip ac mcp continuous rating e designation f interrupting rating combination starter with control power transformer a circuit breaker disconnect. E an earth leakage circuit breaker elcb is a safety device used in electrical installations with high earth impedance to prevent shock.
