Electric VR-8 voltage regulators

Description

Changan Electric VR-8 voltage regulators are designed for reliable operation and ease of mainte-nance and are supplied with a full array of standard features for routine applications. Optional accessories are available to ac-commodate special applicate it is also suitable for the energy saving projects for railway and urban grid. Electric series voltage regulators are available with a full comply with of standard IEEE C57.15 & IEC 60076-21

Standard Features

• Tap changer with motor and power supply
• Position indicator with ADD-AMP adjustment
• Two laser-etched nameplates
• Upper filter press connection
• Oil sight gauge
• Mounting provisions for shunt arresters
• High-creep bushings with clamp-type connectors
• Bolt-down provisions (overhead units)
• Pole-type mounting brackets (overhead units)
• Automatic pressure relief device
• Control cabinet with removable front panel
• Ratio correction transformer
• Conformally coated circuit boards

Material

*VR-8 single-phase step voltage regulators are tap-changing auto transformers designed to automati- cally regulate distribution line voltages in a range of plus or minus 10% in 32 steps of approximately 5/8% each. The following ratings are available:

• Voltage: 2500 Volts (60 kV BIL) through 34500 Volts (200 kV BIL)
• Current: 50 through 1665 Amps
• KVA: 33 through 1000
• Frequency: 50 or 60 Hertz
  Internal potential winding taps and/or an external ratio correction transformer are provided on all ratings so that each regulator may be applied within a range of system voltages.
  A digital control system automatically operates the tap changer mechanism to maintain system voltage within desired limits. The control system is externally programmable to allow precise setting of control limits and provides sophisticated capabilities for special control require- ments, communication, and data logging.
  Overhead type voltage regulators are supplied with support brackets for pole mounting and have bolt-down provisions for pad-mounted applications. Substation type voltage regulators are provided with rectangular substation bases. Elevating platforms are available as an option.
  Ratings and dimensions

Transformer specification

Ratings and dimensions

Voltagekv	Load currentAmp	KVA						Oil liters	Untanking weightkg	Total weightkg
6.6 95KV			A	B	C	D	E
	50	33	1893	1716	800	965	508	217	341	609
	100	66	1892	1715	813	965	508	231	341	609
	150	99	1892	1755	853	995	508	250	380	700
	200	132	1975	1818	915	1232	559	303	445	860
	300	198	2070	1908	988	1333	611	500	678	1200
	400	264	2170	1958	1008	1353	680	550	870	1450
	500	330	2270	1958	1008	1353	680	620	1000	1780
	600	396	2270	1990	1008	1353	680	980	1200	2150

Working principle

VR-line voltage regulator is a special design auto transformer with on-load tap changer, it can automatically “monitoring” and smoothly adjusts the output voltage, and also guarantee the output voltage within the voltage requirement. 27 taps regulation can meet every step 0.75% regulation accuracy.