Voltage Detecting and Indicating System

The Voltage Detecting and Indicating System (VDIS) unit is a self-powered voltage detecting and indicating system.

The VDIS unit is integrated into Schneider Electric cubicles, flush-mountable and designed according to standard IEC 62271-213: 2021. The VDIS unit is fitted with a three LED display and detects the operating voltage presence or absence on the cubicle main circuit.

NOTE: VDIS is not intended to distinguish between voltage not present (that is U < 10% of nominal voltage) and dead circuit state (that is U = 0 V).

The VDIS receives the information through the capacitive sensor installed inside the insulator in EasySet MV.

The range of Voltage Detecting and Indicating System consists of three versions:

No voltage output (VO): voltage presence detection and interface to phase concordance units.
VO FlairDIN: voltage presence detection, interface to phase concordance units and voltage output connection to fault passage indicators.
VO T300: voltage presence detection, interface to phase concordance units and voltage output connection to SC150 for voltage measurement.

For FlairDIN application, the VO cable is connected to the input of the VD23 voltage presence relay or Flair 2xD fault passage indicators.

For T300 application, the VO cable is connected to the VDIS voltage adapter which is linked to the Easergy SC150 (Reference No. EMS59570) module of T300 via an Ethernet cable.

The VDIS unit has three main functions:

Visual indication of MV operating voltage presence or absence,
Phase concordance output,
Voltage Output (VDIS-VO only).

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH You must use the VDIS unit to detect and indicate the presence or absence of operating voltage. You must not use the VDIS unit to distinguish between voltage not present (i.e. U < 10% of nominal voltage) and dead circuit state (i.e. U = 0 V). Failure to follow these instructions will result in death or serious injury.

Range of VDIS Unit Variants

For each version of VDIS unit, there are several variants (depending if it includes Voltage Output option or not). These variants can be identified as follows:

VDIS unit variant	Reference
No voltage output (VO)	VDIS003STD, VDIS004STD, VDIS005STD, VDIS007STD, VDIS008STD and VDIS009STD
VO FlairDIN	VDISFD004VO, VDISFD005VO, VDISFD006VO, VDISFD007VO, VDISFD008VO and VDISFD009VO
VO T300	VDISFD004VO, VDISFD005VO, VDISFD006VO, VDISFD007VO, VDISFD008VO and VDISFD009VO

Variants must be selected according to the following criteria:

The range of MV for the selected EasySet MV product,
The value of capacitor used inside the bushings of cubicle system,
The network frequency,
Associated devices.

Identifying Unit Parts

The VDIS unit consists of two sub-assemblies:

A protection sub-assembly with open seal
An indication sub-assembly

The following graphic shows the different parts of a VDIS unit.

A	Four screws (CBLZS 3x22)	D	Indication sub-assembly
B	Protection sub-assembly	E	Cover
C	Cable gland seal	F	Voltage output cable

Keep the wiring set that is currently inserted in the existing unit. Disassembling the existing unit is required to recover the wiring set and assemble it into the new VDIS unit.