G&W Viper-S and Viper-ST three phase reclosers now have the option of incorporating six integral capacitive voltage sensors to allow for voltage measurement on both the line and load sides of the device without the need for costly and heavy potential transformers. This makes G&W Viper reclosers with Six Voltage Sensors (6VS) ideal for distribution automation applications and loop or network reconfiguration schemes.
Six Voltage Sensing is accomplished through capacitive voltage dividers embedded in the epoxy insulation of each phase of the recloser. The sensors have a Low Energy Analog (LEA) output. The capacitive voltage sensors are isolated from the grid and are able to read phase angle and voltage amplitude with a relatively high accuracy. The sensors do not provide power to the recloser control. External sources such as PTs can be supplied to power the relay.
The voltage sensors have been tested in a third party laboratory. Voltage sensing amplitude accuracy is +/-2% when tested as a system from -10°C (14°F) to +45°C (113°F). The VS accuracy is +/-4% at -40°C (-40°F) to +65°C (149°F). The phase angle accuracy is +/-1° throughout the full temperature range. Current monitoring is provided through integral multi-ratio current transformers encapsulated within the module of each phase. Ratios available are 1000:1 or 500:1. Inputs to the control are field changeable. CT accuracy is +/- 1%.
Trip/Lock out Handle
Removable Silicone Insulators
Grounded Solid Dielectric Modules
Integrated 1000/500: 1 CTs
“L” Shaped Modules
Six 0-144 VAC Analog VS
14-pin Interface without dead-line operation
Other Custom Relay Solutions
Control Connections - Twist style connectors make cable connection between control and recloser extremely easy. The traditional 14-pin recloser control connector design is the same as other "Cooper" style reclosers permitting easy change out of previously installed controls and/or reclosers. Control Capabilities - Various style controls are available depending upon application requirements. Typical control settings include: *Minimum trip for phase, ground and sensitive ground faults. *Numerous preprogrammed and user-defind time current curves for sensing phase or ground faults. *Three independent recloser interval times. Capable of up to four shots to lockout. *Reset time. *Sequence coordination. *Cold load pickup. *Advanced parameters. Refer to control specifications for more details.
The Viper-ST with six voltage sensors works with the SEL-651R control. Typical features of the SEL-651R include:
Control Connections - A twist lock style connector makes the cable connection between the control and the interrupter control box. AC power provides the normal supply power to the control.