SATEC C192PF8-RPR - Manual (Page 36)

Chapter 4 Setup Menus 31
The No-Volt trigger is intended for the use as a fast setpoint override condition for PFC
operations in order to protect the capacitor banks against voltage interruptions. When
used with the Hard Switch-Off action, it can de-energize the output relays in
approximately 25 ms. This avoids bringing the still charged capacitors back after the
voltage is restored. When used with other setpoint actions, this trigger can provide the
response time to alarm conditions at 25-75 ms.
The Uncompensated reactive power trigger is active when the device fails to bring the
power factor or reactive power into the target setpoint range.
Table 4-8 Setpoint Actions (lower window, when middle window is Act)
Code Action
NonE No action
ALAr Assert local alarm
Hrd.OF Hard (immediate) switch-off of the PFC relays
SFt.OF Soft (in turn) switch-off of the PFC relays
StoP Stop (freeze) automatic operation of the PFC
rEL.1 Operate relay #1
rEL.2 Operate relay #2
rEL.3 Operate relay #3
rEL.4 Operate relay #4
rEL.5 Operate relay #5
rEL.6 Operate relay #6
rEL.7 Operate relay #7
rEL.8 Operate relay #8
In.Cn.1 Increment counter #1
In.Cn.2 Increment counter #2
In.Cn.3 Increment counter #3
In.Cn.4 Increment counter #4
ti.Cn.1 Count operating time using counter #1
ti.Cn.1 Count operating time using counter #2
ti.Cn.1 Count operating time using counter #3
ti.Cn.1 Count operating time using counter #4
When a setpoint is operated, its status is always stored to the alarm status register
even if no action is assigned to the setpoint. The alarm status register can be polled
and cleared through communications.
This action causes the alarm LED on the front panel to light, giving the user a local
alarm indication. The alarm LED operates in latched mode, i.e., even if an alarm
condition disappears, the alarm LED continues to operate until the user acknowledges
the alarm from the front panel (see Section 5.1). An alarm LED can be operated from
any number of setpoints using an OR scheme.
These actions are intended for the use with the PFC alarm protection setpoints in order
to protect the capacitor banks against harmful conditions that can cause damage.
When an alarm override condition is detected, the Hard Switch-Off action immediately
switches out all the capacitor banks including those defined as permanently switched
in. When used with the No-Volt trigger condition (see Note to Table 4-7), this action
provides the fastest possible response to voltage interruptions.
The Soft Switch-Off action switches off the capacitor banks progressively in pre-set
disconnection intervals, as long as the alarm condition is present. This allows escaping
the over-voltage or high harmonics conditions with minimum required cycling of the
capacitor banks. The capacitor banks that are defined as permanently switched in will