41-201.
the voltage unit contacts, this effect is negligible. moisture, excessive vibration, and heat. Mount the
relay vertically by means of the four mounting holes
3.2 Trip Circuit
on the flange for semi-flush mounting or by means of
The main contacts will close 30 amperes at 250 volts the rear mounting stud or studs for projection mount-
dc and the seal-in contacts of the indicating contac- ing. Either a mounting stud or the mounting screws
tor switch (ICS) will carry this current long enough to may be utilized for grounding the relay. The electrical
trip a circuit breaker. connections may be made directly to the terminals
The indicating contactor switch (ICS) has two taps by means of screws for steel panel mounting or to
that provide a pickup setting of 0.2 or 2 amperes. To the terminal studs furnished with the relay for thick
change taps requires connecting the lead located in panel counting. The terminal studs may be easily
front of the desired setting by means of a screw con- removed or inserted by locking two nuts on the stud
nection. and then turning the proper nut with a wrench.
4.0 ENERGY REQUIREMENTS For detailed FT Case Information refer to I.L. 41-076.
See Table I.
7.0 ADJUSTMENTS AND MAINTENANCE
5.0 SETTINGS
7.1 Acceptance Check
5.1 Voltage Unit
These are independent relay adjustments. These a. Contacts
are the high voltage and low voltage contact settings Set the left-hand adjustable contact in the center
as described under Section 3, Characteristics. of the scale and adjust the voltage until the mov-
ing contact just makes. Set the left-hand contact
5.2 Indicating Contactor Switch (ICS) back out of the way and bring the right-hand
No setting is required on the ICS unit except the se- contact up until the contacts just make. The
lection of the 0.2 or 2.0 ampere tap setting. This se- pointer should be within 1/32 inch of where the
lection is made by connecting the lead located in left-hand pointer was.
front of the tap block to the desired setting by means
of the connecting screw. b. Calibration Check
Check the scale markings by setting either of the
6.0 INSTALLATION two contacts at a value marked on the scale,
The relays should be mounted on switchboard pan- then alternately apply this voltage ±5%. Contacts
els or their equivalent in a location free from dirt, should make and break respectively.
TABLE I
60 CYCLE BURDEN OF THE CVD RELAY AT CONTINUOUS RATING
Continuous Power Factor
Range Rating Burden Angle † Watts
15 - 60 65 volts 7.85 VA 70° 2.68
30 - 120 132 volts 7.85 VA 70° 2.68
40 - 160 176 volts 7.85 VA 70° 2.68
80 - 320 352 volts 7.85 VA 70° 2.68
105 - 135 148 volts 16.5 VA 78° 3.43
180 - 320 254 volts 16.5 VA 78° 3.43
210 - 270 296 volts 16.5 VA 78° 3.43
† Degrees current lags voltage.
2
41-201.3
8.0 CALIBRATION c. Time-Curve
Adjust the permanent magnet keeper to cali-
8.1 Voltage Unit
brate for the operate times (±5%) given in Table
a. Contacts II.
Apply sufficient voltage to the relay to make the
disc float in the center of its travel. Move both of 8.2 Indicating Contactor Switch (ICS)
the adjustable contacts until they just make with
Close the main relay contacts and pass sufficient dc
the moving contacts. If the contact pointers do
current through the trip circuit to close the contacts
not meet at the same point on the scale, adjust
of the ICS. This value of current should not be great-
the follow on both stationary contacts. Approxi-
er than the particular ICS setting being used. The in-
mately the same follow should be in each of the
dicator target should drop freely.
adjustable stationary contacts.
For proper contact adjustment, insert a.030” feeler
b. Calibration Check
gauge between the core pin and the armature. Hold
The adjustment of the spring tension in calibrat-
the armature closed against the core pin and gauge
ing the relay is most conveniently made with the
and adjust the stationary contacts such that they just
damping magnet removed.
make with the moving contact. Both stationary con-
Set either of the adjustable stationary contacts in tacts should make at approximately the same time.
the center of its travel and apply this voltage to The contact follow will be approximately 1/64” to 3/
the relay. Wind up the spiral spring by means of 64”.
the spring adjuster until the stationary contact
and moving contact just makes. 9.0 RENEWAL PARTS
Check the other scale markings by setting the Repair work can be done most satisfactorily at the
adjustable contact on these markings and apply- factory. However, interchangeable parts can be fur-
ing the corresponding voltage to the relay. The nished to the customers who are equipped for doing
contacts should make within ±5% of scale repair work. When ordering parts, always give the
markings. complete nameplate data.
TABLE II
Relay Rating Under Voltage Over Voltage Test Voltage Operate Time
(Volts) Contact Setting Contact Setting From To (Seconds)
15 - 60 15 34 0 68 1.9
30 - 120 40 120 65 0 1.5
(1.5 sec.)
30 - 120 66 80 66 120 2.0
(2.0 sec.)
40 - 160 40 91 0 182 1.9
80 - 320 80 182 0 364 1.19
†
105 - 135 117 123 120 130 7.5
180 - 230 234 246 240 260 7.5
240 220
†
210 - 270 200 210 205 222 7.5
205 188
†
Allow relay to heat for 30 minutes.
3
41-201.3
Sub 1
184A176
Figure 1. Type CVD Voltage Relay in Type FT-11 Case
4
41-201.3
Sub 1
184A793
Figure 2. Type CVD Voltage Relay with ICS Unit in Type FT-11 Case
5
41-201.3
Sub 1
188A409
Figure 3. Type CVD Voltage Relay with Two (2) ICS Units in Type FT-11 Case
6
IL 41-201.3 - New Information
ABB
ABB Inc.
4300 Coral Ridge Drive
Coral Springs, Florida 33065
Telephone: +1 954-752-6700
Fax: +1 954-345-5329
www.abb.com/substation automation
