Digital Integrated Protection Relay
K-PAM 5500 Series
23
•DEAD BLOCK ENABLED : At the voltage below DEAD VOLT, when the relay power is turned on or after reset,
the UVR element does not operate.
It operates when a UVR occurs after the voltage rises above the DEAD VOLT set value.
•DEAD BLOCK DISABLED : It has the same operating characteristics as inductive relays and maintains the operating
state at under voltage.
⑵ Does frequency measure all three-phase voltages?
- Frequency measurement is the frequency of A-phase voltage.
⑶ dF/dT(81R) test does not operate even if the applied frequency is raised or lowered a lot
- When setting dF/dT to +1.0Hz, 0.3 sec, Block volt : 80V, the test applied voltage and frequency are 1 ÷ 60 ≒ 0.016[Hz],
and apply a frequency changed by 0.02Hz or more per at least 1 cycle is about 20 cycles (about 0.3 sec) for voltage A.
At this time, the voltage should be at least 80V.
⑷ How can the user directly change the contact settings?
- The relay can be used by changing the LED and contact configuration by the user through internal logic (LOGIC).
When changing contacts or LEDs, you can connect to a PC using the PC software (KBIED_MNE) provided on our website
and refer to the user manual posted on the website for how to use the program.
Protection element setting and system setting, etc. can be set at the front of the relay.
⑸ When the relay is installed on the panel and tested, the measured value is displayed less than the applied current.
- Please refer to the install/withdraw method in this user's manual.
Since the enclosure and relay are drawn out, normal measurement may not be possible if the enclosure is installed incorrectly.
⑹ Normally during solar power generation, the measured current of the relay and the measured current with
a clamp meter are different.
- The digital relay measures and displays only the fundamental wave excluding the harmonic content. However,
most general clamp meters and multimeters measure values including harmonic content, which may result in
different measured values between products.
⑺ During solar power generation, the power value displayed by the relay and the power value displayed by the
inverter are different.
- Move to the MENU / SETTING / SYSTEM / POWER SYSTEM / GENERAL category and check the VT, CT 1st and 2nd
ratios to see if the settings are different from the inverter settings.
Since the values of voltage and current applied to the product are internally calculated with the values set above and
displayed as the primary value, you must check the settings and change them when they are set to different settings.
