Related Manuals for SamplexPower STS-30
Summary of Contents for SamplexPower STS-30
- Page 1 Transfer Owner's Please read this manual BEFORE Manual Switch operating your 30 Amps transfer switch STS-30...
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Page 2: Table Of Contents
OWNER'S MANUAL | Index SECTION 1 Safety Instructions ..............3 SECTION 2 General information ............. 4 SECTION 3 Layout ................5 SECTION 4 Description, Features and Principles of Operation ....7 SECTION 5 Installation and Operation ............ 8 SECTION 6 Troubleshooting .............. -
Page 3: Safety Instructions
1. IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS. THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS FOR MODEL STS-30 THAT SHALL BE FOLLOWED DURING INSTALLATION AND MAINTENANCE OF THE TRANSFER SWITCH. The following safety symbols will be used in this manual to highlight safety and... -
Page 4: General Information
SECTION 2 | General Information 2.1 FUNCTION OF A TRANSFER SWITCH In case of failure of the main AC power source like the Grid power, it is desirable to switch the critical AC loads to a standby / back up AC power source like a Generator or an Inverter. -
Page 5: Layout
SECTION 2 | General Information Frequently, the total AC power requirement of all the system loads exceeds the campground / RV park’s power inlet and consequently, requires the genset to power the entire system. Thus, there may be 3 types of AC power sources. Transfer switches are used to configure switching of the AC power sources so that the priority of the AC sources is: - Grid power, or - Genset (Generator), or... - Page 6 SECTION 3 | Layout LED1 PCB1 LEGEND: R1: Transfer Relay T1: Line "L", Common T2: Neutral "N", Common T3: Line "L1", NO (Normally open contact of Transfer Relay) T4: Neutral "N1", NO (Normally open contact of Transfer Relay) T5: Line "L2", NC (Normally closed contact of Transfer Relay) T6: Neutral "N2", NC (Normally closed contact of Transfer Relay) T7: (-) Input for relay coil T8: (+) Input for relay coil...
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Page 7: Description, Features And Principles Of Operation
Principle of Operation 4.1 DESCRIPTION Transfer Switch STS-30 is designed for single phase operating voltage of 120 VAC, 60 Hz and can handle input/ output current of up to 30 A or an Apparent Power of 3600 VA (Apparent Power = Volts X Amps. In this case: 120 V X 30A = 3600 VA). It consists of a Transfer Relay (R1, Fig. -
Page 8: Installation And Operation
SECTION 4 | Description, Features and Principle of Operation As soon as the 110 VDC control signal is fed to terminals T7 and T8 of the relay coil, the green LED 1 lights up indicating that the relay coil has energized. The delay of around 20 to 25 sec is required when the AC load is transferred to the Generator. -
Page 9: Installation Configurations
SECTION 5 | Installation and Operation A ¾” cable clamp has been provided (4, Fig. 3.1). Additional ¾” and 1” knockouts have been provided for convenience. Please ensure that a cable clamp is used for cable entries. For making firm connections to the terminals (T1 to T6, Fig 3.2) of the Transfer Relay, please crimp appropriate size of insulated ring / spade lugs on the ends of the conductors of the cables. - Page 10 SECTION 5 | Installation and Operation LEGEND: LED1 PCB1 T1 LINE “L” , COMMON T2 NEUTRAL “N” , COMMON T3 LINE “L1” , NO (NORMALLY OPEN) T4 NEUTRAL “N1” , NO (NORMALLY OPEN) T5 LINE “L2” , NC (NORMALLY CLOSED) T6 NEUTRAL “N2”...
- Page 11 SECTION 5 | Installation and Operation a. As Generator is not being used in this configuration, disable the Time Delay Circuit by changing the position of DIP Switch SW1 from OFF to ON position (Switch is factory preset in OFF condition). b.
- Page 12 SECTION 5 | Installation and Operation g. Testing of Operation: Switch OFF both the Inverter and the Grid input (ii) Switch ON the AC input power from Grid / Shore Power Cord (RV). As the time delay has been disabled (As explained at (a) above, if the Generator is not being used, the time delay should be disabled by changing the position of the DIP Switch SW1 to ON position), the relay coil will energize as soon as Grid AC input is switched ON.
- Page 13 SECTION 5 | Installation and Operation a. Re-arrange the pre-wired internal connections (Fig 5.2) to those shown in Fig 5.4 as follows: (i) Connections for Input Cord for feeding AC input from Inverter: At Terminal T5, disconnect Black wire from Inverter "L". Connect to •...
- Page 14 SECTION 5 | Installation and Operation e. Plug the NEMA5-15P plug (2, Fig 3.1) of the Inverter power cord (1, Fig 3.1) to the output of the Inverter (Fig 5.4). As pointed out earlier, in case the Inverter capacity is >1800 VA & up to 3600 VA, appropriate connection arrangement using AWG#10/3 wiring will have to be used.
- Page 15 SECTION 5 | Installation and Operation 5.5.4 Switching Between Grid and Generator Please refer to Fig. 5.5 This configuration is used in RV application when it is desired to switch between the Grid Shore Power Cord and the onboard Generator. When the load demand in the RV is more than the capacity of the Shore Power Cord / the breaker capacity of the RV Park / Camp Ground connection, the on-board Generator is required to be started.
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Page 16: Troubleshooting
SECTION 5 | Installation and Operation LEGEND: T1 LINE “L”, COMMON LED1 T2 NEUTRAL “N”, COMMON PCB1 T3 LINE “L1”, NO GREEN OR BARE, (NORMALLY OPEN) “GND” FROM GENERATOR T4 NEUTRAL “N1”, NO (NORMALLY OPEN) T5 LINE “L2”, NC (NORMALLY CLOSED) NEMA5-20R T6 NEUTRAL “N2”, NC DUPLEX AC OUTLET... - Page 17 SECTION 6 | Troubleshooting LOCALIZED LOW VOLTAGE Low voltage conditions can be caused by specific situations such as an additional cord which is too long and too small for the load. Do not attempt to extend the RV power cord by using a 16 gauge 100 foot extension cord, or any cord not rated for an RV-size load.
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Page 18: Specifications
SECTION 7 | Specifications MODEL STS-30 INPUT / OUTPUT VOLTAGE 120 VAC, 60 Hz INPUT / OUTPUT CURRENT 30A* BATTERY CHARGER RECEPTACLE NEMA5-20R Duplex Receptacle 20A maximum 16A continous Fused at 20A For 1" and 3 /4" KNOCKOUTS MAXIMUM OPERATING TIME OF THE RELAY... -
Page 19: Warranty
Warranty 2 YEAR LIMITED WARRANTY STS-30 Transfer Switch manufactured by Samlex America, Inc. (the “Warrantor“) is warranted to be free from defects in workmanship and materials under normal use and service. The warranty period is 2 years for the United States and Canada, and is in effect from the date of purchase by the user (the “Purchaser“). - Page 20 Ph: 1 800 561 5885 Fax: 1 888 814 5210 Local Numbers Ph: 604 525 3836 Fax: 604 525 5221 Website www.samlexamerica.com USA Shipping Warehouses Kent, WA Plymouth, MI Canadian Shipping Warehouse Delta, BC Email purchase orders to orders@samlexamerica.com 11001-STS-30-0917...
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