Lumel KS3.2 User manual

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DIGITAL
SYNCHRONIZING
UNIT
KS3.2
SERVICE MANUAL
CERTIFIED
144 x 144 x 77 mm
www.materm.si
tel: [phone]

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CONTENTS
1. APPLICATION ........................................................................................ 3
2. DELIVERY SPECIFICATION ................................................................. 3
3. BASIC SAFETY REQUIREMENTS AND USER´S SAFETY ................. 4
4. INSTALLATION ...................................................................................... 5
4.1. Fixing way ........................................................................................ 5
4.2. Scheme of external connections ..................................................... 6
5. SERVICE OF THE KS3-2 UNIT ............................................................. 7
5.1. Frontal plate ..................................................................................... 7
5.2. Working modes of the KS3-2 synchronizing unit ............................. 8
5.2.1. Measuring functions of the KS3-2 ............................................. 8
5.3. Configuration .................................................................................... 9
5.3.1. Alarm configuration .................................................................... 10
5.3.2. Interface configuration ................................................................ 12
6. RS-485 INTERFACE .............................................................................. 13
6.1. Description ....................................................................................... 13
6.2. Register map .................................................................................... 14
7. TECHNICAL DATA ................................................................................ 16
8. EXECUTION CODES AND ORDERING PROCEDURE ........................ 19
9. MAINTENANCE AND WARRANTY ...................................................... 20

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1. APPLICATION
The KS3-2 digital synchronizing unit is destined to synchronize generators during their
coupling in parallel to the network or other generators working at the rated 50 or 60 Hz
frequency. The full synchronization is obtained at the moment when follows the equalization of
the voltage, frequency and phase angle. The phase angle difference of signals from the gene-
rator and the network is indicated by the synchroscope which has the shape of a circle of
diodes.The voltage difference between the generator and the network in the -20%...0...+20%
interval is indicated by the upper horizontal line ∆V, which the zero in the middle.
The lower horizontal diode line with the zero in the middle, designated ∆f, indicates the
frequency difference of signals from generator and the network in the -10%...0...+10%
(45...55 Hz) interval. The green diodes on horizontal bargraphs and diodes inside the circle
are lighting on the unit frontal plate at the moment when the synchronization is reached.
The unit includes two relay outputs. One of the relay signal indicates the moment when we
reach the synchronization. The second relay signals the measuring range exceeding of the
chosen quantity.
2. DELIVERY SPECIFICATION
The KS3-2 synchronizing unit set includes:
- KS3-2 synchronizing unit ......................................... 1pc
- screw holders fixing the unit on a panel ................. 4pcs
- service manual ........................................................ 1pc
- warranty card ........................................................... 1pc

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3. BASIC REQUIREMENTS AND USERS SAFETY
KS3-2 synchronizing units are intended to be installed in panels, switchboards and cubicles
They are in conformity with IEC 1010-1+A1 (1996) safety requirements.
Remarks concerning safety:
The unit installation should be carried out by a qualified staff.
One must consider all accessible aspects of the protection.
The instrument lefs the factory in perfect condition regarding technical safety. In order to main-
tain this condition and to ensure safe operation, the user must comply with indications and
markings contained in the following instructions:
Before mounting, ensure that the operating voltage and mains voltage set are the same,
and then proceed with installation.
The power supply must be connected as shown in the relevant diagram.
Before the switching on, check the correctness of meter connections
Before any maintenance and/or repairs, whenever the instrument must be opened, it must be
disconnected from all power sources.
Maintenance and/or repairs must be carried out only by qualified authorized personnel.
If there is ever the suspicion that safe use is no longer possible, the instrument must be taken
out of service and precautions taken against accidental use.
Operation is no longer safe when:
- there is clearly visible damage,
- the instrument no longer functions,
- after lengthy storage in unfavorable conditions,
- after serious damage incurred during transport.
Operator safety
The instrument described in this service manual is intended for use by properly trained staff
only.
Maintenance and/or repairs must be carried out only by authorized personnel.
For proper, safe use of the instrument and for maintenance and/or repairs, it is essential that
the persons instructed to carry out these procedures follow normal safety precautions.

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4. INSTALLATION
4.1. Fixing way
One should cut-out a hole of 138+0.5 x 138+0.5 mm dimensions in the panel and fix the synchro-
nizing unit by means of four screw holders. The unit housing, which overall dimensions are
144 x 144 x 77 mm, is made of self-extinguishing plastics. The screw terminal strips enable the
connection of external conductors which maximal cross-section is 2.5 mm2.
Precautions in case of breakdowns
If it is suspected that the instrument is no longer safe, for example due to damage incurred
during transport or use, it must be taken out of service and precautions taken to prevent any
accidental use.
Contact authorized technicians for checks and any repairs.
Fig. 1. Overall dimensions and fixing way of the KS3-2 unit

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4.2. Scheme of external connections
Fig. 2. Connection scheme
CAUTION: before connection check the phase sequence

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Fig. 3. View of the KS3-2 unit frontal plate
5. SERVICE OF THE KS3-2 UNIT
5.1. Frontal plate

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5.2. Working modes of the KS3-2 synchronizing unit.
After its switching on, the unit makes an autotest and lights all diodes. This sequence occurs
after each start of the unit. The measuring mode begins after carrying out tests.
5.2.1. Measurement functions of KS3-2.
Working mode calling Entry Exit
Designation
1. Measuring mode Through the entry into
another mode
2. Parameter configuration In the configuration or
mode procedure after the last parameter
3. Interface configuration In the configuration or
mode procedure after the last parameter
Table 1
The KS3-2 synchronizing unit ensures the measurement of: difference of RMS voltage and
frequency in measuring circuits of the network (Unetwork1, fnetwork1) and the generator (Ugen, fgen)
∆ U= ∆ f= and the phase angle (ϕ).
A lighting point on each bargraphs informs about the value of the given parameter. The syn-
chroscope enables the identification of the phase rotation direction, at ∆ f < 5% of the network
frequency. The lighting point of the synchroscope rotates in the clockwise direction when the
100
1
12 ⋅
−
L
LLUUU 100
1
12 ⋅
−
L
LL fff

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frequency of the switched on generator is higher than the network frequency. At the generator
frequency smaller than the network frequency, the lighting point rotates in the anti-clockwise
direction. When one of the two quantities (∆ f, ∆ V) exceeds the measuring range, the Alarm2
(OUT) is being activated.
The signalling of each alarm can be confirmed by switching on the attributed relay. Functions
of ∆ f and ∆ V value interval atributions for the synchronization alarm switching on and the
activation of relay outputs are settled in the configuration alarm mode.
In the execution with an interface, the unit additionally ensures the measurement of the volta-
ge RMS value and the frequency in the network (Unetwork, fnetwork) and generator (Ugen, fgen)
measuring circuits. The KS3-2 synchronizing unit also enables the measurement of minimal
and maximal voltages and frequencies.
Voltages are multiplied by the set voltage ratio of measuring transformers.
5.3. Configuration
To enter into the configuration mode one should press two keys: and during
ca 3 seconds, till the switching of the sound signal off.
One choose the parameter by means of keys. The active parameter is
signalled by flashing.
Modifications are introduced by the key while increasing the interval and the
key while decreasing the interval.

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The displayed interval is defined by two pairs of symmetrical diodes regarding the middle of
the line. Manufacturer′s values are: for ∆U=1% Unetwork and for ϕ = ±2° (el.)
5.3.1. Alarm configuration
Interval ∆∆
∆∆
∆V parameter
Position 1 2 3 4567
Displayed <-2,2> <-4,4> <-6,6> <-8,8> <-10,10> <-12,12> <-14,14>
value
Interval for
the synchro- ±0.2 ±0.4 ±0.6 ±0.8 ±1.0 ±2.0 ±3.0
nization
Table 2