Stulz Tel-Air-2 Series, Operating Instructions Manual

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E/0618/35A/70
12.11 Voltage control device
– VCC
The voltage control relay, is an additional device which stops the power supply to prevent faults if
the voltage not in rated tolerance. The relays monitors according to the respective setting an
voltage whether it exceeds or falls below a specified value or is within a certain range (window
monitoring). The relay installed in the electrical box has a display and can be parametrized with
three keys. The display shows the present value and a symbol that indicates whether the relay is
set to monitor whether the voltage exceeds or falls below a specified value or whether it is set to
window monitoring. The setting range for the upper and lower threshold values extends from 17
V to 275 V. Reset function: Auto- or manual reset selectable.