Deif CSQ-3 User manual

DEIF A/S Tel.: [phone]
Frisenborgvej 33, DK-7800 Skive Fax: [phone]
Denmark E-mail: [e-mail]
DEIF A/S
User manual
Check synchroscope type CSQ-3
4189340263L (UK)
• Multi function, precision LED synchronoscope
• Easy push-button programming of all set points
• Very high user safety
• High immunity to harmonic distortion
• Dead bus functionality
• Special version for marine applications

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List of contents
1. Warnings, legal information and notes to CE-marking and UL listing ............. 3
2. Application and functionality summary .............................................................. 3
3. Operation of display, push-buttons and LEDs ................................................... 6
3.1 LEDs ..................................................................................................................... 7
3.2 Settings ................................................................................................................. 8
4. Terminal list......................................................................................................... 10
4.1 Overview of the terminals.................................................................................... 10
5. Wiring diagrams.................................................................................................. 11
5.1 AC input connections .......................................................................................... 11
5.1.1 Connection diagram......................................................................................... 11
6. Commissioning ................................................................................................... 12
7. Technical data ..................................................................................................... 12
8. Dimensions.......................................................................................................... 15
9. Order specifications ........................................................................................... 15
Example of an order specification for the CSQ-3................................................. 15
Appendix 1: Setting and parameters for synchronising...................................... 16
Settings.................................................................................................................... 16
Guidelines for setting of the CSQ-3....................................................................... 18
Visual representation of the parameters............................................................... 18

User manual, Check synchroscope CSQ-3
4189340263L (UK)
1. Warnings, legal information and notes to CE-marking and UL
listing
This manual gives general guidelines on how to install and operate the CSQ-3.
Installing and operating the CSQ-3 implies work with dangerous currents and voltages.
Therefore this should only be done by qualified personnel. DEIF A/S takes no
responsibility for operation or installation. If there is any doubt about how to install or
operate the system on which the CSQ-3 is measuring, the company responsible for
the installation or the operation must be contacted.
The CSQ-3 is CE-marked with respect to the EMC directive for residential, commercial
and light industry plus industrial environment. This covers all environment types where
the CSQ-3 can normally be used.
The CSQ-3 is CE-marked with respect to the low-voltage directive for up to 600V
phase to ground voltage, installation category (overvoltage category) III and pollution
degree 2.
The CSQ-3 can be delivered with UL listing. Please refer to the section “Technical
data” for installation information as required by the UL.
The package contains the following items:
•Check synchroscope CSQ-3 unit
•User manual
•Two fixing clamps
•A plugable connection (mounted on the unit)
•Cable for system status output (only marine version)
2. Application and functionality summary
The CSQ-3 check synchroscope is a microprocessor-based synchronising unit
providing measurement of all relevant values for synchronising a generator to a net
(busbar). It is used in any kind of installation where manual or semi-automatic
synchronising is required.
In the CSQ-3 there is a possibility of adjusting the following synchronising
requirements: The voltage difference between GEN and BB, the size of the phase
window and the length of the synchronising pulse.
In addition to that there is an indication of ‘UGEN TOO HIGH’ or ‘UGEN TOO LOW’ (red
LEDs), phase difference within the preset window ‘ϕOK’ (yellow LED), and finally
synchronising output active, ‘SYNC.’ (green LED).

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Display/reading
The unit measures the two inputs voltages: Generator (GEN) and busbar (BB),
respectively. The phase difference from GEN’s zero-crossing to BB’s zero-crossing is
calculated by the processor and is shown on the LED circle, consisting of 36 red LEDs.
The red LEDs are only lit one at a time and its position indicates the phase difference
between GEN and BB. The lit LED simulates the pointer tip of an analogue pointer
instrument. If the LED is lit in the 12 o’clock position, the phase difference is 0
degrees. In the 6 o’clock position, 180 degrees etc. With 36 LEDs the resolution is 10
degrees.
The movement of the lit LED’s position indicates the frequency difference between
GEN and BB. If the indication is turning clockwise (too fast), the GEN frequency is too
high in proportion to the BB frequency. If the indication is turning counter-clockwise,
the proportion is inversed. The rate of the motion tells about the frequency difference.
The faster the rotation, the bigger the frequency difference, e.g. 1 rotation per second
= 1Hz. If the BB frequency is 50Hz and the rotation turns right, the GEN frequency will
be 51Hz in this example.
If the frequency difference between GEN and BB is becoming too big (>3Hz), the
circular motion stops and a LED will be lit at the ‘too fast’ or ‘too slow’ mark, dependent
on which direction the GEN frequency has to be adjusted to.
Normal synchronising
The unit automatically calculates the synchronising parameters to check if there is the
required space for the synchronising inside the preset phase window. These
calculations compare the frequency difference with tRand the size of the phase
window. When tRis set to ∞, tdcan be set by the user and is then included in the
calculations instead of tR.
If the ∆ϕ window is set symmetrically, both underfrequency synchronising and over-
frequency synchronising is possible.
Under- or overfrequency synchronising
When the ∆ϕ window is set asymmetrically the following functionality is possible:
If the ∆ϕ window is set asymmetrically with a higher positive than negative ∆ϕ
value, only synchronising with the generator input at lower frequency than the
busbar input is possible (underfrequency synchronising).
If the ∆ϕ window is set asymmetrically with a lower positive than negative ∆ϕ
value, only synchronising with the generator input at higher frequency than the
busbar input is possible (overfrequency synchronising).
Note:
This function is not active with tRset to ∞.

User manual, Check synchroscope CSQ-3
4189340263L (UK)
Dead bus synchronising
When the dead bus function is set, the synchronising relay will be activated and the
green LED (SYNC) will be lit, when the busbar voltage is below the dead busbar
preset level and the GEN voltage exceeds 80% of nominal value.
Please notice that when the voltage on the net has been restored, the CSQ-3 will
remain in the dead bus function for a period of 5 seconds.
Power up reset
The unit will operate when the GEN voltage exceeds 80% of the nominal value. Below
this level no functionality is obtained.
µP supervision output
Due to the demands from the classification societies (GL) a special optocoupler output
has been added on the marine version.
From this output it is possible to supervise the internal microprocessor (µP).
If an error is present, the output changes state from a low to a high impedance (open
collector output).

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3. Operation of display, push-buttons and LEDs
To get access to the settings, remove the front frame and the front foil.
The CSQ-3 can be operated in two different modes: ‘Normal mode’ and ‘setting mode’.
Normal mode is used to display measuring values, and setting mode is used to view
the settings or change them to the desired functionality.
∆ U
max
min
∆
U
+5
%
bus
U
OFF
10
20
30
0 0 40
0 0
R
t
Deg
+10
+15
+20/(40)-20/(40)
-15
-10
-5
Mode
%
Sec
±10
±5
d
t
U
1.0
0.5

User manual, Check synchroscope CSQ-3
4189340263L (UK)
3.1 LEDs
The CSQ-3 has the following LEDs on the fronts showing different operating
information.
LEDs on primary front (normal mode):
LED
Colour
Function
Circle
Red
The lit LED in the circle shows the phase difference between
GEN and BUSBAR
SYNC.
Green
All preset sync. parameters are OK, and the output relay is
activated
ϕOK
Yellow
The phase difference between GEN and BUSBAR is within
the preset window
U
GEN
TOO HIGH
Red
The voltage difference between GEN and BUSBAR is outside
the preset range. UGEN is too high
U
GEN
TOO LOW
Red
The voltage difference between GEN and BUSBAR is outside
the preset range. UGEN is too low
LEDs on secondary front (setting mode):
LED
Colour
Function
Circle
Red
Parts of the circle are used as scales for the different settings
∆ϕ
Yellow
Shows that the
∆ϕ scale is active
t
d
Yellow
Shows that the t
d
scale is active
Please notice that tdonly becomes active with tRset to ∞
t
R
Yellow
Shows that the t
R
scale is active
∆U
Yellow
Shows that the
∆U scale is active
U
bus
Yellow
Shows that the U
bus
scale (dead bus) is active
For further information about the settings, please see appendix 1.

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3.2 Settings
NORMAL
U min.
SET/VIEW
pos
SET/VIEW
NEG
SET/VIEW
tr
SET/ACTIVATE
DEAD-BUS
NORMAL
MODE:
SAVE
automatically
tr =
td
SET/VIEW
YES
NO
U max.
8

User manual, Check synchroscope CSQ-3
4189340263L (UK)
Operation
The operation occurs via the secondary foil accessible when the primary foil/front
frame is removed. The operation occurs by means of 3 push-buttons: Mode (toggle),
up arrow (▲) and down arrow (▼).
Control of settings
The mode button is held down for about 2-3 seconds to obtain the setting mode. This is
confirmed by the fact that the LED is lit at the ∆U scale and that the setting of the ∆U
max. parameter can be read on the matching scale. With ▲and ▼the setting can be
changed.
For every subsequent push on the mode button, a change to the next parameter occurs.
These can be read and changed in a corresponding way. When mode is pushed after
the last parameter, one returns to normal mode.
When leaving the last setting menu, the LED circle ‘rotates’ to indicate that the current
setting has been automatically saved.
Please notice that the preset window, ∆U and ∆ϕ, is divided into two separate settings,
making asymmetrical setting of this parameter possible.
Also please notice that if the settings are changed unintentionally, these are saved when
the setting mode is left.
Change of ∆ϕ range
The normal range of ∆ϕ is -20°...-5°and 5°...20°in 1°steps.
This can be changed to -40°...-10°and 10°...40°in 2°steps.
Step down to the 20°point with the down arrow button. While pressing the down arrow
button, press the up arrow button and the scale will change from normal range to the
scale 2 x normal range. Press the up arrow button to return to normal range. While
pressing the up arrow button, press the down arrow button, and the scale will change
from 2 x normal range to normal range. Please notice that the 2 x normal range mode
is indicated on the LED circle by activation of 2 LEDs each time ∆ϕ is changed.
Factory settings
When the product is delivered from the factory, the following basic settings will be set:
∆U:
5% of ±UBB
tR:
0.5 sec.
∆ϕ:
±10°
Dead bus:
OFF
Restorage of factory settings
Activate the two arrow buttons simultaneously. While doing this hold down the mode
button for approximately 5 seconds. Then the LED circle will light up and rotate to
indicate that the factory settings have been restored.

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4. Terminal list
4.1 Overview of the terminals
Terminal
no.
Signal
symbol
Signal name
1
R (L1)
Busbar voltage
x
Not used
2
S (L2)
Busbar voltage
x
Not used
3
SYNC.
Relay output
4
SYNC.
Relay output
x
Not used
5
R (L1)
Generator voltage
x
Not used
6
S (L2)
Generator voltage
Only on marine version:
System status circuit off
= failure
+ open collector
- open collector
Rear view of the unit:
Land version Marine version

User manual, Check synchroscope CSQ-3
4189340263L (UK)
5. Wiring diagrams
5.1 AC input connections
When ordering the CSQ-3, the correct range of voltage inputs must be specified. They
must be connected as shown below (unused terminals are not shown).
5.1.1 Connection diagram

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6. Commissioning
Before commissioning:Check phases for correct voltage and correct phase
sequence.
Warning: Incorrect voltage may lead to malfunction and
damage of the unit.
7. Technical data
Accuracy: ±2°(electrical degrees)
Resolution: 10°(36 LEDs)
Settings, range: ∆ϕ: ±5…20°in 1°steps or
±10…40°in 2°steps
∆U: ±1…10% in 1% steps
tR : 0…1 sec. in 0.1 sec. steps or ∞
td : 0…1 sec. in 0.1 sec. steps
Ubus offset: Off or 4 levels of noise suppression
(dead bus)
Max. frequency difference: No limit
Input range (UN): 100…127V AC (115V AC) or
220…240V AC (230V AC) or
380…415V AC (415V AC) or
440…480V AC (450V AC)
Busbar input: Load: 2kΩ/V
Generator input:(Max. 2VA). Also supply for the unit
Max. input voltage: 1.2 x UN, continuously
Above 450V: 1.1 x UN, continuously
2 x UN for 10 sec.
Frequency range: 40…70Hz (supply)
Relay contact: 1 SPST-NO-contact
Relay contact ratings: Resistive loads: AC1: 8A, 250V AC
(Gold plate silver alloy) DC1: 8A, 24V DC
Inductive loads: AC15: 3A, 250V AC
DC13: 3A, 24V DC
(UL/cUL: Resistive load only)
Mechanical life: 2 x 107
Electrical life: 1 x 105(nominal value)

User manual, Check synchroscope CSQ-3
4189340263L (UK)
Optocoupler output: System status off = failure
NpN optocoupler output
Max. 40V, 10mA
2 wires AWG 20 (red/black)
30 mm length
(Only in marine version)
Temperature: -10…55°C (nominal)
-25…70°C (operating)
-40…70°C (storage)
Temperature drift: Set points:
Max. 0.2% of full scale per 10°C
Galvanic separation: According to EN/IEC61010-1
All input/output groups to ground: 3.75kV
Between all input/output groups: 3.75kV
Test conditions: 50Hz, 1 min.
Climate: HSE, to DIN40040
EMC: CE-marked according to EN50081-1/2, EN50082-1/2
and IEC255-3
Connections: Max. 2.5 mm2 (single-stranded)
Max. 1.5 mm2 (multi-stranded)
Materials: All plastic parts are self-extinguishing to UL94 (V0)
Protection: Front: IP52. Terminals: IP20
According to IEC529 and EN60529
Type approval: For current approvals please see www.deif.com
(Only valid for marine version)
UL listing: On request, the instrument can be delivered
according to UL listing:
UL508, E230690
Tambmax 50°C
For use in a flat surface of type 1 enclosure
Wire: 24-12 AWG
Use 60/75° C copper conductors only
Main disconnect is to be provided by installer
Terminal screw torque: 5-7 lb-in.
Installed in accordance with the NEC (United States)
or the CEC (Canada)
CAUTION: Risk of electrical shock. More than one
main disconnect may be required to de-energize
equipment before servicing.

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Dimensions: Please see drawing in section 8
Panel cut-out: 92 x 92 ±1 mm
Weight: < 0.40 kg

User manual, Check synchroscope CSQ-3
4189340263L (UK)
8. Dimensions
All dimensions in mm.
9. Order specifications
Input voltage and type must be specified when ordering the CSQ-3.
Order specification for the CSQ-3 consists of the following:
CSQ-3 - UN- type
where UNand type are as follows:
Code
Function
Options
U
N
Input voltage
‘115V’: (100…127V AC input range)
‘230V’: (220…240V AC input range)
‘415V’: (380...415V AC input range)
‘450V’: (440...480V AC input range)
Type
‘Land’: Means the land version without GL
approval. This is the standard version.
‘Marine’: Means the marine version with GL
approval and equipped with an additional
output for surveillance.
Example of an order specification for the CSQ-3
CSQ-3 – 415V – Marine

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Appendix 1: Setting and parameters for synchronising
Settings
∆U
Here the allowed relative voltage difference between GEN and busbar is adjusted. The
regulating range is ±1…10% in steps of 1%. The adjustment is made individually for
∆UMIN and ∆UMAX, so asymmetrical adjustment is possible. The setting is done
according to the following formula:
(UGEN – UBUSBAR) x 100
∆UMIN, ∆UMAX =
UBUSBAR
If the preset value is exceeded, one of the two UGEN LEDs will emit red light, and
synchronising is not possible.
If the generator voltage is too low, the UGEN too low LED will be lit.
If the generator voltage is too high, the UGEN too high LED will be lit.
If both the UGEN LEDs are lit simultaneously, there is an overvoltage error on the input.
In this case, disconnect the unit and check the applied voltage level!
∆ϕ
Here the phase window is adjusted, in which synchronising can take place. The
adjustment starts from ±5°and the window can open symmetrically or asymmetrically
around this value.
The regulating range is -20°...-5°and 5°...20°, in 1°steps or
-40°...-10°and 10°...40°, in 2°steps.
tR
Here the length of the pulse for the synchronising relay is adjusted.
The regulating range is 0...1 sec. in steps of 0.1 sec. or ∞.
This function makes it possible to adjust the synchronising pulse according to the
external breakers demands (closing time).
For special purposes it is also possible to adjust tRto ∞(infinite). This setting will (after
td has expired) provide a synchronising pulse as long as the following conditions are
met:
•Phase is inside the phase window
•Voltage > 70% of UNOMINAL
td
Here the time is adjusted, in which the phase difference must be inside the preset
synchronising window to allow SYNC. The regulating range is 0...1 sec. in steps of 0.1
sec.
tdis only activated if tRis set to ∞.

User manual, Check synchroscope CSQ-3
4189340263L (UK)
Dead bus
The possibility of closing the circuit breaker even though the busbar voltage is missing.
There is an extra adjustment, UBUS, where the level of dead busbar can be set. This
facility makes dead bus synchronising possible, even though there is noise on the
busbar. The regulating range is off or 10...40% of UNin steps of 10%.
Setting
Dead bus function UBUS
OFF
Deactivated
10
Activated within the range 15-25% of actual generator voltage > 70%
20
Activated within the range 25-30% of actual generator voltage > 70%
30
Activated within the range 30-40% of actual generator voltage > 70%
40
Activated within the range 40-50% of actual generator voltage > 70%
Please notice that this setting is a coarse step regulation for suppression of possible
noise on the busbar. The scale 10-20-30-40 should therefore be considered more as a
4 level noise suppression than as an accurate measuring setting.
Please notice that when the voltage on the net has been restored, the CSQ-3 will
remain in the dead bus function for a period of 5 seconds.

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Guidelines for setting of the CSQ-3
Visual representation of the parameters
The figure below shows the different parameters:
Commissioning
Normally tR is adjusted so it equals the circuit breakers closing time and ∆ϕ-/∆ϕ+ to
max. allowed synchronising error.
Please notice that the CSQ-3 calculates space for tR(breaker closing time) within the
chosen ∆ϕ window at the actual ∆f (slip frequency). Therefore the max. synchronising
error will never exceed the chosen ∆ϕ window.
Calculation example
The breaker closing time is 200mS, and tRis chosen to 200mS. The phase window is
set symmetrically to ±10°(electrical degrees). Then the max. ∆f can be calculated
using the following formula:
Synchronising relay pulse will not be emitted if ∆f exceeds 0.278Hz.
(∆ϕ-) + (∆ϕ+)
∆f =
360 x tR
10 + 10
∆f = = 0.278Hz
360 x 0.2

User manual, Check synchroscope CSQ-3
4189340263L (UK)
Calculation of the actual synchronising error – not to be mistaken for the max.
synchronising error which is solely determined by the chosen ∆ϕ window
The next examples apply to situations where tRis set in the range 0.1...1 sec.
Example:
With a slip frequency (∆f) of 0.1Hz the phase changes with a rate of 36°/sec. If ∆ϕ is
set to ±10° and tRis set to 0.2 sec. = breaker closing time, the actual synchronising
error can be calculated.
The moment the phase is within the set phase window (∆ϕ) the relay of the CSQ-3 is
activated on condition that there is space for the chosen tR, in this case 0.2 sec. If ∆f is
too big it will cause lack of space for the chosen tRtime within the chosen ∆ϕ window.
Example 1:
With a phase change of 36°/sec. the phase will change 7.2° during the 0.2 sec. This
means that we can now calculate the phase displacement at the exact moment when
the breaker closes. ∆ϕ is set to -10° and +10°. The CSQ-3 relay will be activated -10°
before top (12 o’clock position), and after 7.2° the breaker closes which means that the
breaker closes 10° - 7.2° = 2.8° before top, that is an actual synchronising error of -
2.8°. Applying the formula on page 17 the max. ∆f with the shown settings can be
calculated to be 0.277Hz.
Example 2:
If we assume that the slip frequency in the actual case is 0.2Hz the phase changes
with a rate of 72°/sec. With a phase change of 72°/sec. the phase will change 14.4°
during the 0.2 sec. which gives a synchronising error of 10° - 14.4° = -4.4°. The
negative result means that the breaker closed 4.4° after top, that is an actual
synchronising error of +4.4°.
Example 3:
The same as examples 1 and 2 but with a slip frequency of 0.3Hz = 108°/sec. At tR=
0.2 sec. the phase will change 21.6°. As the ∆ϕ window is set to ±10°, the CSQ-3 will
calculate that there is no longer space for a tRpulse of 0.2 sec. and therefore no relay
pulse is emitted.
General formula for the above-mentioned:
Actual synchronising error = (∆ϕ-) - 360 x ∆f x breaker closing time (tR).
Alternatively at negative slip frequency:
Actual synchronising error = (∆ϕ+) - 360 x ∆f x breaker closing time (tR).
If the result is negative the synchronising will take place after top (0°) provided that
there is space for tRwithin the ∆ϕ window.
If you want to avoid synchronising after top, ∆ϕ is set asymmetrically. At positive slip
frequency (∆f) as in the shown example a setting of ∆ϕ- to -10° and ∆ϕ+ to +5° would
have as a result that synchronising after top of more than 5° would not be possible.

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The length of the relay pulse tRcan never be set to a lower value than the breaker
closing time, whereas tRcan be set to a higher value if you want the max. slip
frequency (∆f) to be lower to limit the rush of current of the breaker (the generators) in
connection with the synchronising.
Example:
In the light of the above-mentioned examples tRis changed to 0.4 sec. With a slip
frequency (∆f) of 0.1Hz = 36°/sec. and tR= 0.4 sec. the phase changes 14.4° during
the 0.4 sec. If ∆ϕ is set to ±10° the CSQ-3 will calculate that there is space for tR. With
this setting the synchronising error will be identical with the synchronising error in
example 1 (-2.8°) as the breaker closing time is the same (0.2 sec.). But the max. ∆f
can now only be 0.138Hz and not, as in example 1, 0.277Hz. The max. slip frequency
(∆f) could also be controlled by setting ∆ϕ differently. If ∆ϕ was set to ±5° instead of
±10° the max. ∆f would be 0.138Hz at tR= 0.2 sec. With this setting and a ∆f of 0.1Hz
the actual synchronising error will be +2.2°. Please notice that the breaker now closes
2.2° after top and not, as in example 1, 2.8° before top. The choise of setting must be
based on the knowledge of the actual installation in which the CSQ-3 is applied. But
the examples are to show that tRand ∆ϕ are inextricably connected and influence the
same parameters, but with different results as to the calculation of the actual
synchronising error.
If tRis set to infinite (∞) the max. allowable ∆f can no longer be controlled by means of
tR. When tRis set to infinite the setting of tdis automatically activated. Infinite tRis
primarily used where the CSQ-3 is applied as supervision of an automatic
synchronising system or in connection with closing of a tie breaker where you want to
control frequency, phase and voltage to be within certain values before the breaker is
closed.
The setting of tdis to be calculated from ∆ϕ and the estimated max. allowable ∆f.
(∆ϕ-) + (∆ϕ+)
td=
360 x ∆f
Example 1:
∆ϕ is set to ±7°, and a max. ∆f of 0.05Hz at the moment of synchronising is estimated
to be allowable.
| -7 | +7
td=
360 x 0.05
td= 0.77 sec. ~ 0.8 sec.
Please notice that when tRis set to infinite (∞) the synchronising pulse (the relay
contact of the CSQ-3) is interrupted the moment the phase is outside the set phase
window. As the timer tdstarts the moment the phase is within the set phase window