Type Designation - Grundfos MGE Serie Montage- Und Betriebsanleitung

Pos. Description
1 Residual-current circuit breaker, type B
N Neutral
L Phase
PE Protective earth
Connection example for three-phase supply
The drawing shows an example of a mains-connected three-phase motor with a main switch, a backup fuse and a residual-current circuit
breaker, type B.
1
L1
L2
L3
PE
Pos. Description
1 Residual-current circuit breaker, type B
L1 Phase 1
L2 Phase 2
L3 Phase 3
PE Protective earth
4.2.6.1 Overvoltage and undervoltage protection
Overvoltage and undervoltage may occur in case of unstable power supply or a faulty installation. The product stops if the voltage falls outside
the permissible voltage range. The product restarts automatically when the voltage is within the permissible voltage range. The product
requires no additional protection relay.
The product is protected against transients from the power supply according to EN 61800-3. In areas with high lightning intensity, we
recommend external lightning protection.
Related information
8.1 Technical data, single-phase motors
8.2 Technical data, three-phase motors
4.2.6.2 Overload protection
The product reduces the speed automatically if the upper load limit is reached, and it stops completely if the overload condition continues.
The product remains stopped for a set period. After this period, the product automatically attempts to restart. The overload protection ensures
that the product is not damaged. The product requires no additional protection.
4.2.6.3 Overtemperature protection
The electronic unit has a built-in temperature sensor as an additional protection. The product reduces the speed automatically if the
temperature exceeds a certain level, and it stops completely if the temperature keeps rising. The product remains stopped for a set period.
After this period, the product automatically attempts to restart.
4.2.6.4 Protection against phase unbalance
Phase unbalance on the power supply must be minimised. The three-phase motor must be connected to a power supply with a quality
corresponding to IEC 60146-1-1, class C. This also ensures long life of the components.
4.2.7 Functional modules
The following functional modules are available for MGE motors:
Description
Basic functional module
Standard functional module
Advanced functional module
The selection of module depends on the application and the required number of inputs and outputs.
4.2.7.1 Basic functional module, FM 100
Inputs and outputs
The module has these connections:
• one analog input
L1
L2
L3

Type designation

FM 100
FM 200
FM 300
17