3RV Motor Starter Protectors/Circuit Breakers up to 100 A Accessories Mountable accessories Overview The 3RV1 motor starter protectors/circuit breakers have three main contact elements. In order to achieve maximum flexibility, auxiliary switches, signal switches, auxiliary trip units and isolator modules can be supplied separately. Mounting location and function These components can be fitted as required on the circuit breakers/motor starter protectors without using tools. For overview graphic see "General Data" --> "Overview". Front side Notes: Transverse auxiliary switches 1 NO + 1 NC or 2 NO or 1 CO contact An auxiliary switch block can be inserted transversely on the front.
The over- all width of the motor starter protectors remains unchanged. A maximum of 4 auxiliary contacts with auxiliary switches can be attached to each motor starter protector. Transverse auxiliary switches must not be used for the 3RV17 and 3RV18 circuit brea- kers. Left-hand side Lateral auxiliary switches (2 contacts) One of the three auxiliary switches can be mounted laterally for each motor starter protector/circuit breaker. The contacts of the auxiliary switch close and open together with the main contacts of the motor starter protector. Notes: A maximum of 4 auxiliary contacts with auxiliary switches can be attached to each motor starter protector/circuit breaker.
1 NO + 1 NC or 2 NO or 2 NC The overall width of the lateral auxiliary switch with 2 contacts is 9 mm. Auxiliary switches (2 contacts) and signal switches can be mounted separately or together. Lateral auxiliary switches (4 contacts) One auxiliary switch can be mounted laterally for each motor starter protec- tor. The contacts of the auxiliary switch close and open together with the main contacts of the motor starter protector/circuit breaker. The signal switch cannot be used for the 3RV17 and 3RV18 circuit breakers. 2 NO + 2 NC Signal switches for sizes S0, S2 and S3 The overall width of the lateral auxiliary switch with 4 contacts is 18 mm.
One signal switch can be mounted at the side of each motor starter protector with a rotary operating mechanism. Tripping 1 NO + 1 NC Short-circuit 1 NO + 1 NC The signal switch has two contact systems. One contact system always signals tripping irrespective of whether this was caused by a short-circuit, an overload or an auxiliary trip unit. The other con- tact system only switches in the event of a short-circuit. There is no signaling as a result of switching off with the handle. In order to be able to switch on the motor starter protector again after a short-circuit, the signal switch must be reset manually after the error cause has been eliminated.
Right-hand side Auxiliary trip units The overall width of the signal switch is 18 mm. One auxiliary trip unit can be mounted per motor starter protector/circuit breaker. Notes: Shunt trip units For remote-controlled tripping of the motor starter protector/circuit breaker. The trip unit coil should only be energized for short periods (see schematics). Accessories cannot be mounted at the right-hand side of the 3RV11 motor starter protectors with overload relay function. or Undervoltage trip units Trips the motor starter protector when the voltage is interrupted and prevents the motor from being restarted accidentally when the voltage is restored.
Used for remote-controlled tripping of the circuit breaker/motor starter protector. Particularly suitable for EMERGENCY-STOP disconnection by way of the cor- responding EMERGENCY-STOP pushbutton according to EN 60204-1. or Undervoltage trip unit with leading auxiliary contacts Function and use as for the undervoltage trip unit without leading auxiliary contacts, but with the following additional function: the auxiliary contacts will open in switch position OFF to deenergize the coil of the undervoltage trip unit, thus interrupting energy consumption. In the "tripped" position, these auxiliary contacts are not guaranteed to open.
The leading contacts permit the motor starter protector/circuit breaker to reclose. (2 NO) Top Isolator modules for sizes S0 and S2 Isolator modules can be mounted to the upper terminal end of motor starter protectors of sizes S0 and S2. The overall width of the auxiliary trip unit is 18 mm. The isolator module cannot be used for the 3RV17 and 3RV18 circuit breakers. Notes: The supply cable is connected to the motor starter protector through the iso- lator module. The isolator module covers the terminal screws of the transverse auxiliary switch.
If the isolator module is used, we therefore re- commend that either the lateral auxiliary switches be fitted or that the isolator modu- le not be mounted until the auxiliary switch has been wired. The plug can only be unplugged when the motor starter protector is open and isolates all 3 poles of the motor starter protector from the network. The shock-protected isolation point is clearly visible and secured with a padlock to prevent reinsertion of the plug. For a complete overview of which accessories can be used for the various motor starter protectors see "Introduction" --> "Overview" --> "Motor Starter Protectors". 28 Siemens · 2009