7SG14 Duobias-M-200 Commissioning
Check the communications link by retrieving the relay settings (Relay->Settings->Get Settings)
Reydisp Evolution allows off line generation of relay setting by saving the relay Settings File and then
downloading it. This saves time at site as late setting changes will then be minimised.
To download a Settings File from the laptop to the relay; select Relay->Settings->Send All Settings. Confirm the
action and the user will be informed whether the settings have been successfully entered into the relay. It is worth
doing a few spot checks on the setting to be confident the correct settings are installed.
8.2 Setting via Relay Fascia Pushbutton
The relay can be set from the fascia by utilising the
×
,
Ø
,
Ö
and ENTER buttons. Settings can be selected with
the arrow buttons. Pressing ENTER when the setting to change is found will make the setting flash. This allows
the
×
and
Ø
buttons to be used to alter the setting. Once the desired setting is selected, the ENTER pushbutton
must
be pressed for the relay to register the selected setting. The setting will now stop flashing indicating this
value will be utilised by the relay software.
The menu structure is shown in the “Description of Operation “ Section of this manual.
9 Secondary injection tests
Isolate the auxiliary D.C. supplies for alarm and tripping from the relay and remove the trip and inter-trip links.
The recommended test set to use is an Omicron Type CMC256 (or CMC156 plus CMA156). Automatic test
software can be provided to allow input of settings and automatic testing and reporting. The Omicron set should
be connected in accordance with the manufacturer’s instructions.
The following settings must be selected on relay to avoid any confusion during testing: -
The initial and bias slopes settings should be set to the chosen values.
W1 Interposing CT Multiplier
1.00
W1 Interposing CT Connection
Yy0
W2 Interposing CT Multiplier
1.00
W2 Interposing CT Connections
Yy0
Bias
Slope
Limit
4x
Differential
Highset
4x
9.1 Proving Inputs and Outputs
The number of inputs and output contacts present will vary with model.
The easiest way to prove output contact operation is to use Reydisp Evolution. The relay output contacts can be
closed by selecting RELAY -> CONTROL -> CLOSE OUTPUT RELAY menus. All outputs can also be selected to
“Protection Healthy” to test the contact sense.
The status inputs must be tested by application of rated voltage. The “high” (operated) or “low” (unoperated) state
of each status input is most easily checked using the Instruments window of the Reydisp Evolution software.
9.2 Accuracy of Measurement
Inject all of the current inputs with nominal current (including neutral and REF inputs) in turn, and record the Relay
Currents measured by the relays in Table 4 below. Tap [
Ø
] to select Secondary Meters: -
e.g.
W1 Sec’y Currents x I
N
1.00 1.00 1.00
Use
Ø
and
×
to select the current measured by each of the inputs injected: -
e.g.
W2 Sec’y Currents x I
N
1.00 1.00 1.00
©2010 Siemens Protection Devices Limited
Chapter 7 Page 7 of 20
