TheSunPower Logo
member sign Comment log Contact Us apply job customer log order list quotation
Member Zone Comment To MD. Contact Us. Apply Job Sign In History Inquiry
Welcome to the sun power
Company Name
Menu Catagory

Menu Information
Download List
UPS Technology
new Ǩͺ͹-Alarm Code

Menu After Sales service
ŧ¹Թ-Product Register
ǨͺѺСѹ-Check Warranty
ٹԡ-SmartCare Service Center
Ἱѷ -Contact us

facebook googleplus ͹

ѷ Ыѹ ӡѴ
31 »Ъط 59 ¡ 5
ǧҧ ࢵ觤
. 10140

The Sun Power Co.,Ltd.
31 Soi Prachautit 59 Yeak 5,
Bangkok 10140 THAILAND.


Tel: 662-872-9501/4
Fax: 662-872-9505 

The Sun Logo
Copyright 2008-2016
by The Sun Power Co.,Ltd.
All Rights Reserved.


Category: STS - Source Transfer Switch / Model Name: STS for 3 Phase

Model Number: STS3Phase

Download Brochure

Check Alarm Code
  - 3 Phase in - 3 Phase out / 50Amp to600Amp
  - Increased power quality
  - Easy monitoring all parameters on LCD display
  - Fast microcontroller (32 mips)
  - Power blackout protection
  - Automatic static switching
  - Remote monitoring of input power sources
  - Easy statis and mechanical transfer between separate input sources
  - Remote management of power events
  - Power event logging
  - Advanced RS232 communication features
  - DRY contact alarm interface
  - Password protected login system from remote site (time Access)
  - 2 redundant power suppies for electronic boards (hot swappable)
  - Easy front access to all components inside of the STS
  - Second protection cover on live circuits which prevents electrical shock
  - Input sources protected by fuses
  - 3 positioned Maintenance bypass switch which prevent cross currents between input sources
  - User adjustable parameters by entering a password
  - Built in real time clock
  - Alarm history (with date and time)
  - Automatic transfer test from a remote site or using front panel
  - Front panel Lamp test
  - External emergency shutdown (EPO) input
  - Hot plug construction during maintenance bypass
  - High current output tolerance up to 1000%
  - Temperature sensor inside the Cabinet
  - Fast voltage black-out circuit
  - Input phase balance and phase sequence fault detect circuit
  - Adjustable Input source frequency lower/upper limits

Product Descriptions

STS Three Phase is a microprocessor controlled transfer switch, designed for automatic and manual switching between two AC power sources, with interruption to the load of less than 2 msecs with synchronized sources and of less than 12 msecs for unsynchronized sources.
STS utilizes SCRs connected in opposite parallel pairs (six pairs for 6 pole models ,eight pairs for 4 pole models) . Three or four pairs of SCRs are used to connect the AC load to the power supply input referred to as PREFERRED, under normal conditions. The other three (of four) pairs of SCRs are on standby to transfer the load to the other power supply input referred to as ALTERNATE in case of a failure of the PREFERRED input supply.
Source 1 and Source 2 supply inputs should come from two different AC sources with nominally identical voltages, phases and frequencies. The aim of the STS is uninterrupted transfer from one AC power supply to the other, in case of a fault in the PREFERRED supply.
Before and during transfer from one source to the other, the operating conditions of the SCRs are carefully monitored to prevent crosscurrents between two sources. The break-before-make technique makes healthy and uninterrupted transfers possible.
During normal operation, PREFERRED network supplies the load when both inputs are available. Selection of the PREFERRED network, automatic re-transfer, retransfer delay, overload behavior of STS, alarm hold time, nonsynchronized transfer behavior, overload and transfer inhibit reset modes may be set by the user on the control panel of the unit.
Permitted voltage, phase difference and frequency tolerance are also adjustable by the service personnel on the control panel.

*ԡ෤Ԥ Source Transfer Switch (STS)

InputVoltage380,400VAC,(3 wires for 3 pole version And 4 wires for 4 pole version)
 Voltage Range310-430VAC
 Frequency50 or 60 Hz +/- 5%
 Voltage Distortion<10%
 Input voltage error windowadjustable
 Input frequency error windowadjustable
 Voltage380,400VAC,(3 wires for 3 pole version And 4 wires for 4 pole version)
 Crest factorup to 3.5
 Synchronized transfer timemax 1.8 msec (on 0 current mode)
 Non-synchonized transfer timemax 10 msec in 0 current mode, 0-25 sec adjustable in delay mode and in 0 current mode
 Load power factor range0.6 lagging to 0.9 leading
 Overload100% to 150% = 1 minute, 150% to 200%= 10 sec,>200%-0.5 msecs,1000%=20msecs
 Type of transferBreak before make
 As standardOver current inhinit LCD front panel, MBP
IndicatorLCD display2 lines 16 Charactre LCD display
 Monitored ParametersSource 1 Voltages, Source 2 Voltages, Output Load, Phase Balance, Synchronization Source 1 Frequency, Source 2 Frequency, Phase Angel Degree, Temperature
 Indications8 LEDs arranged as mimic diagram
 Control buttons5 push button interactive with LCD panel
 Event log64 recorded alarm logs from panel or RS232
General Neutral connectionavailable at 4 pole version
 Transfer time<5msec : within CBEMA & IEEE for synchronized sources <11msec: for unsynchronized sources.
 Manual transfer switchavailable
Physical Dimension (mm)WxDxH684x530x1500/685x570x1770/915x735x1935
 Weight (kg)175/205/215/240/340
EnvironmentOperating temperature0-40 C
 Relative Humidity(Non-condensing)0-90%
Communication Interface (Communication Ports)RS232 standard
 Dry contact signalsOutput Inhibit Relay, Summary Alarm Relay, Static Or Manual Transfer Relay, S1 /S2 Backfeed Trip Relay, Preferred Source Indicator Relay, Load Is Connected To Alternate Input Source Relay
International Standard StandardsEN 62310-2,EN 62310-1, EN 60950-1