Operating instructions

21
LIMITING RELAY K2
The relay K2 only closes (in default setting) if at least one of the following values is exceeded:
• 1. max. admissible effective value of the load current
• 2. max. admissible effective value of the load voltage
• 3. max. admissible active power of the load
The relay releases if none of the values is exceeded anymore. It is possible to set which indications
lead to switching of the relay. Recommendation: keep the default setting.
OPTIONAL RELAY K3
If changes are made to the default relay settings due to the application, then preferably the relay
K3 should be re-parameterized.
It is possible to realize functions like for instance a follow-up relay for ventilator control or by pass
the alarm relay at startup of the system. It may also be used as a further alarm relay or limiting relay,
by re-parameterization.
The illustration shows the relay K3 for bridging the startup alarm.
2.5 MONITORING
Faults occurring in the power controller or in the load circuit are signaled (s. error messages of
LBA-2). Signaling is performed via LED Fault and via relay with potential-free change-over contact.
The fault buffer may be read via LBA-2 or the interface after selecting the status line. Simultane-
ously with the fault signal, the pulse shutdown may optionally also be set (Pulse inhibit On / Off).
The number and content of occurred warnings or errors are shown in the status line of LBA-2 touch
display. By selecting the status line, the message can be retrieved.
2.5.1 MONITORING OF MAINS VOLTAGE
The power controller is equipped with mains voltage monitoring. The limits may be set for U mains
min and U mains max. If limits are reached, a status message will be generated.
FIG. 3 SWITCH-ON FAULT BRIDGING
delay adjustable
(with Thyro-Tool Family: LED/Output: K3/Monoflop time)