WaveStar Static Transfer Switch 2000A 3-Pole
30
Ctrl Nr: PM375118-004
primary logic has embedded software that controls both the low inrush algorithm and the concurrent
recording of any switch transfer events with its real time wave form capture feature. The secondary logic
is connected to the load side of the input MCSWs in the static switch and is used to trigger the switch to
transfer upon opening of the input MCSWs along with the primary logic.
When performing transfer testing / operation of the static switch, the recommended method is to perform
transfers automatically by using the front touch screen / graphics on the static switch or alternatively to
manually use the redundant operation interface panel. When performing outage testing, the preferred
method is to perform any outage operation by opening the upstream breaker suppling power to the either
source on the static switch. This simulates a true site event and allows the primary logic to detect a real
event upstream of the switch. If an outage is performed by opening the MCSWs at the static switch, the
switch will still fail safe and transfer, however some of the primary logic has been bypassed and thus, this
is not the recommended method for initiating an outage.
When connecting load banks to the static switch to test the switch operation under load conditions, it is
important that the fan logic on the load banks is connected to a separate power source. The reason for
this method is that in some cases, the load bank’s fan logic may not sustain power during the 4 ms to 8
ms transfer of the switch
– this may cause the load banks to drop power during an event that is seen by
the switch to be normal and recorded on the switch as a “good” transfer event as per the design of the
switch.
4.1.6
Phasing Verification Procedure
With all Circuit Breakers (MCCBs and MCSWs) open, verify correct phasing by verifying the following
measurements:
•
Zero volts between the phase A poles on the line side of all input Circuit Breakers.
•
Zero volts between the phase B poles on the line side of all input Circuit Breakers.
•
Zero volts between the phase C poles on the line side of all input Circuit Breakers.
•
Zero volts between the phase A poles on the line side of all bypass Circuit Breakers.
•
Zero volts between the phase B poles on the line side of all bypass Circuit Breakers.
•
Zero volts between the phase C poles on the line side of all bypass Circuit Breakers.
4.2
Additional Installation Requirements
4.2.1
Communications Installation
After acceptance testing, the unit should be configured for communications, including dry contacts, if not
already done. See Chapter
5 Customer Communications Connections
.
4.2.2
STS Setup
After installation, start-up, and communications configuration, the STS should be set up in three
categories:
•
Administrative setup: assign user PINs, passwords, and access levels. See Chapter
8 System
Setup: Administration
.
•
Operational setup: configure transfer parameters. See Chapter
9 System Setup: Operation
.
