UL 1066-2016 pdf download

UL 1066-2016 pdf download.Low-Voltage AC and DC Power Circuit Breakers Used in Enclosures.
21 Trip Device Calibration Tests
Seclion 21 effectIve ApI 13. 2017
21.1 The calibration tests shall be performed as part of the sequence testing of the circuit beaker and the test results shall comp’y with both ANSI C37.1 7 and the manufacturers published curves.
Exception: If the test results comply with ANSI C37. 17 but do not meet the manufacturer’s published curves, additional calibration tests may be performed where at least 6 points on the manufacturers curve are checked. The results of all points shall comply with ANSI C37. 17 requirements.
RATINGS
22 General
Secllon 22 etteclive Api 13. 2017
22.1 Much of the information appearing in this section is redundant with that appearing in the ANSI referenced standards and is presented for convenience.
22.2 Each AC device shall have one or more maximum voltage ratings of 635, 508, or 254 V for application on systems having nominal voltage ratings of 600, 480, 240 V ac. AC Integrally fused power circuit breakers and ac power circuit breakers intended to be connected in senes with fuse drawouts shall be rated 600 V maximum.
22.3 General purpose type low-voltage dc power circuit breakers shall be rated 300 V maximum.
22.4 The 3-phase short-circuit or short-time current rms symmetrical ratings shall be one of the following:
14,000, 18.000, 22,000, 25,000, 30,000. 35,000. 42.000. 50.000, 65.000, 85,000, 100.000. 130.000. 150.000, or 200.000 A. The single phase rating shall be 87 percent of the 3-phase ratings.
22.5 The short-circuit current ratings for dc circuit breakers shall be as Indicated In IEEE C37.14 or IEEE C37.16.
MARKINGS
23 General
Secllon 23 effectIve Api 13. 2017
23.1 An ac circuit breaker shall be marked In accordance with IEEE C37.13.
23.2 A dc circuit breaker shall be marked in accordance with IEEE C37.14.
23,3 A drawout-mounted device shall be mared with at least one of the following;
a) To show the designahon of an intended adapter.
b) To show the minimum enclosure size. insulation requirements and ventilation requirements, or
c) To refer to a drawing showing the minimum requirements, and ventilation requirements.
SA4 Calibration Test
SA4.1 Circuit breakers with trip devices that are sensitive to ambient temperatures are to be calibrated or ambient compensated for use in an ambient of 50°C (122°F).
SA5 Inclined Operations
SA5.1 Calibration Check Tests as described in ANSI C37.50 are to be performed with the test device inclined 30 degrees from the horizontal plane. Results shall not exceed ±5 percent of the limits from the manufacturer’s operating curves or the limits in ANSI C37. 17.
SA6 Vibration Test
SA6.1 General
SA6. 1.1 During and after the vibration tests specified in SA6.2 and SA6.3. a naval circuit breaker shall not open the contacts when they are in the closed position.
SA6.1.2 After the vibration tests specified in SA6.2 and SA6.3, a naval circuit breaker:
a) Shall continue to operate as intended without adjustments or repairs,
b) Shall meet the limits of the specified time bands for calibration.
c) Fuse units shall not open the circuit, change protective characteristics, lose filler material, or show signs of deformation, and
d) Shall have a minimum insulation resistance of 10 megohms.
SA6.1.3 To determine whether the contacts open during the vibration lests, an oscillograph is to be connected across the circuit breaker contacts.
SA6.1.4 For these tests, peak-to-peak amplitude Is defined as the maximum displacement of sinusoidal motion (total table displacement).