Regulating System; Electrical System; Figure 7 Electrical Cabinet (Typical Example) - Edwards EOSi Series Instruction Manual

2.5 Regulating system

If the vacuum process demand is less than the throughput of the pump, the vacuum
pressure decreases. When the pressure is lower than the set‑point (necessary vacuum
pressure), the regulator decreases the motor speed.
If the vacuum pressure decreases and the motor operates at minimum speed, the
regulator stops the motor. When the motor is stopped automatically and the vacuum
pressure reaches the set‑point, the regulator starts the motor again.
Q-version
The regulation system of the Q-version is designed to handle fast cycling duties. When
the vacuum pressure reaches the set-point, the regulator will keep the motor running at
increased speed for an adjustable time before the regulator decreases the motor speed.

2.6 Electrical system

Electric components

Figure 7 Electrical cabinet (typical example)

1. Transformer (T1) 1. Transformer (T1)
3. Circuit breaker (Q15) 3. Circuit breaker (Q15)
5. Frequency converter (Z1) 5. Frequency converter (Z1)
Electrical diagrams
You can find the electrical diagram in the electric cabinet.
6996022910_B
6996022910_B - General description
Page 19
2. Circuit breaker (Q1) 2. Circuit breaker (Q1)
4. Contactor (K15) 4. Contactor (K15)
6. EMC filter (U1) 6. EMC filter (U1)
09/2021 - ©Edwards Limited